In 2025, the world’s cleanest countries are not just global leaders in environmental health—they are also innovators in climate policy, renewable energy, and sustainable development. These nations have earned top rankings through rigorous assessment by the Environmental Performance Index (EPI) and the Climate Change Performance Index (CCPI), which together provide the most authoritative and data-driven evaluations of national environmental performance.

The EPI, developed by Yale and Columbia Universities, uses 58 indicators across 11 categories—ranging from air and water quality to biodiversity and climate policy—to rank 180 countries on how well they meet sustainability targets. The CCPI, meanwhile, evaluates 63 countries and the EU, covering over 90% of global greenhouse gas emissions, and assesses performance in GHG emissions, renewable energy, energy use, and climate policy.

These indices are vital tools for policymakers, businesses, and communities, offering a granular view of each country’s strengths and weaknesses, helping to set targets, track trends, and identify best practices for a sustainable future. High-ranking countries benefit from advanced regulatory frameworks, greener infrastructure, and new market opportunities for sustainable technologies. Here’s a closer look at what sets each of the top 10 apart in 2025:

1. Estonia (EPI Score: 75.3)

Estonia leads the world in cleanliness and sustainability, thanks to its extensive forest cover, effective use of bioenergy, and a strong focus on natural resource management. The country has set ambitious climate goals, including a 70% reduction in greenhouse gas emissions by 2030 and carbon neutrality by 2050.

Estonia achieved an 11.3% emissions reduction in late 2024, outpacing the rest of the EU, even as its economy grew. The capital, Tallinn, has become a beacon of urban sustainability, winning the ITB Earth Award 2025 for its zero-waste Song and Dance Celebration, which drastically cut single-use plastics and promoted circular economy practices.

Estonia’s environmental policies have also led to Europe’s cleanest air and ongoing investments in wind, solar, and energy storage. However, the country faces challenges in fully phasing out fossil fuels and balancing biomass production with forest conservation.

2. Luxembourg (EPI Score: 75.0)

Luxembourg stands out as a small nation with outsized environmental achievements, earning an EPI score of 75.0 in 2024 and a 4.1-point rise over the past decade. The country leads the world in water management, boasting a near-perfect score of 90.6 in Water Resources and an astounding 99.8 in Sanitation & Drinking Water. Over 55% of Luxembourg’s land is protected, contributing to a top-tier biodiversity score of 84.8.

The nation’s capital has pioneered green investments, while advanced wastewater treatment and strict EU-aligned standards keep pollution low. While Luxembourg excels in ecosystem vitality and heavy metal pollution control, it continues to work on reducing per capita greenhouse gas emissions and curbing tree cover loss.

3. Germany (EPI Score: 74.6)

Germany ranks third globally with an EPI score of 74.6 in 2024, marking a 4.4-point improvement over ten years. The country treats 100% of its urban wastewater, achieving a high 89.1 in Water Resources, and protects a significant share of its land and seas, reflected in its 82.4 Biodiversity & Habitat score.

Germany’s robust environmental policies are complemented by massive investments in green infrastructure and renewable energy. The nation’s cities are recognized for clean air, efficient public transport, and progressive urban planning. Germany’s approach demonstrates that sustainability can go hand in hand with industrial progress, though ongoing industrial emissions remain a challenge.

4. Finland (EPI Score: 73.7)

Finland secures the fourth spot with a 2024 EPI score of 73.7, though this reflects a slight decrease from its 2014 score. The country is a global leader in public health, scoring a perfect 100.0 in both Sanitation & Drinking Water and Heavy Metals. Finland’s well-managed forests, protected natural areas, and clean air contribute to its strong ecosystem vitality.

The nation’s deep cultural connection to nature is evident in its policies, which seamlessly integrate sustainability into daily life. Finland’s challenge lies in maintaining its high standards amid growing urbanization and climate pressures.

5. United Kingdom (EPI Score: 72.7)

The United Kingdom earns an EPI score of 72.7 in 2024, up by 2.1 points over the past decade. The UK has made significant progress in reducing carbon emissions, largely through aggressive wind energy deployment and expanded recycling programs. Urban green spaces and biodiversity conservation have improved city livability and environmental health.

The UK continues to update its climate policies to meet international targets, but faces ongoing challenges with air quality in some metropolitan areas and the need for further emissions reductions.

6. Sweden (EPI Score: 70.5)

Sweden ranks sixth with a 2024 EPI score of 70.5, showing a modest 1.6-point increase over ten years. The country’s energy mix is dominated by hydropower and wind, and it is a pioneer in negative emissions technologies.

Sweden’s cities are models of sustainable urban development, and the nation’s commitment to clean air, water, and biodiversity is unwavering. However, Sweden faces pressure to further reduce emissions from transportation and industry to meet its ambitious climate goals.

7. Norway (EPI Score: 70.0)

Norway holds the seventh position with a 2024 EPI score of 70.0, up 3.6 points over the last decade. The country boasts nearly universal access to clean drinking water and sanitation, and its electricity is almost entirely supplied by hydropower.

Norway’s proactive climate policies and investments in electric mobility and carbon capture have resulted in some of the world’s lowest per capita emissions. The country’s challenge is balancing oil and gas exports with its climate commitments.

8. Austria (EPI Score: 69.0)

Austria scores 69.0 on the 2024 EPI, reflecting a slight decrease of 0.3 points over ten years. The country excels in maintaining clean cities and countryside through strict agricultural and chemical regulations. Austria’s public transport system and urban planning support eco-living, while strong environmental laws ensure high water quality and effective waste management.

Austria’s challenge is to address areas of stagnation and reinvigorate progress on climate adaptation and emissions reduction.

9. Switzerland (EPI Score: 68.0)

Switzerland earns a 2024 EPI score of 68.0, up 1.8 points over the last decade. The country is renowned for its pristine landscapes, robust waste management, and advanced water treatment systems.

Switzerland’s environmental protection laws and public engagement in sustainability initiatives help maintain high living standards and ecological health. However, Switzerland must continue to innovate in renewable energy and reduce its ecological footprint to stay ahead.

10. Denmark (EPI Score: 67.9)

Denmark rounds out the top ten with an EPI score of 67.9 in 2024, a 1.7-point increase over ten years. The nation is a global leader in wind energy and urban planning that prioritizes cycling and green spaces. Denmark’s comprehensive recycling policies and low pollution levels make it a model for clean living. 

The country’s ongoing challenge is to further cut emissions from agriculture and transportation while maintaining economic growth.

How Are These Rankings Determined?

Environmental Performance Index (EPI):

• Uses 58 indicators across 11 categories, including air quality, water and sanitation, biodiversity, habitat protection, and climate policy.
• Weights environmental health (40%) and ecosystem vitality (60%) to reflect both immediate human well-being and long-term sustainability.
• Draws data from the WHO, UN, and other global agencies, providing a scorecard for each country and highlighting leaders and laggards.

Climate Change Performance Index (CCPI):

• Assesses four main categories: GHG emissions (40%), renewable energy (20%), energy use (20%), and climate policy (20%).
• Uses 14 indicators, combining quantitative data (from IEA, FAO, UNFCCC) and qualitative expert assessments of national and international climate policy.
• Covers 63 countries and the EU, representing over 90% of global GHG emissions.

These indices are not just academic—they guide policy, inform investment, and help countries benchmark progress toward sustainability goals. High-ranking countries typically have strong regulatory frameworks, transparent governance, and engaged civil societies, making them attractive for sustainable business and investment.

Why Does This Matter?

• Policy Guidance: Countries use EPI and CCPI data to set targets, track trends, and refine environmental policies.
• Business and Investment: High scores signal a favorable environment for green investment and sustainable business operations.
• Public Health: Clean air, water, and effective waste management directly improve quality of life and reduce healthcare costs.
• Global Leadership: These nations serve as models for others striving to balance economic growth with environmental stewardship.

Summary point

As environmental challenges grow increasingly urgent worldwide, the achievements of these top 10 cleanest countries in 2025 offer both inspiration and a practical roadmap for sustainable development. Their success demonstrates that with visionary leadership, innovative technologies, and committed public participation, it is possible to safeguard natural resources, improve public health, and foster economic growth simultaneously.

By learning from their policies and practices, other nations can accelerate their own journeys toward a cleaner, greener, and more resilient future—ensuring a healthier planet for generations to come

Qatar Airways has signed a landmark strategic agreement with Barzan Holdings and Satys Aerospace to establish a state-of-the-art widebody aircraft painting facility at Dukhan Air Base, marking a major advancement in the region's aviation infrastructure.

The agreement, announced by Qatar Airways, is part of a long-term collaboration aimed at strengthening Qatar’s aviation ecosystem through capability building, technology transfer, and innovation. The new facility will be the first of its kind in the region to utilize next-generation digital aircraft painting technologies, positioning Qatar as a regional hub for specialized aviation services.

Set to support commercial, VIP, and military aircraft, the project includes two widebody paint bays and a multipurpose hangar capable of handling light maintenance tasks. The facility is designed to reduce aircraft downtime by eliminating the need for overseas ferrying for repainting or livery changes and will cater to airline operators across the Middle East and the Indian subcontinent.

Featuring cutting-edge digital systems and future-ready robotic painting technologies, the facility will implement environmentally sustainable practices, including energy-efficient paint booths and advanced waste management solutions. It will also support dual-use operations in both civil and defense aviation, in alignment with Qatar’s strategy to localize high-value services and nurture local aerospace expertise.

“This partnership delivers strategic aviation infrastructure that serves both our national and regional ambitions,” said Eng. Badr Mohammed Al Meer, Group CEO of Qatar Airways. “Together with Barzan Holdings and Satys, we are building capabilities that define the future of Qatar’s aerospace sector and empower local talent.”

Eng. Mohammed Bader Al Sadah, CEO of Barzan Holdings, added: “This agreement strengthens our commitment to Qatar’s defence and aerospace capabilities. The facility will establish Qatar as a centre of excellence in the region, advancing local industry and supporting the goals of Qatar National Vision 2030.”

Christophe Cador, CEO of Satys Aerospace, emphasized the company’s dedication to the project, stating: “Since our partnership began in 2021, we have remained committed to delivering top-tier services in quality, innovation, and turnaround time.”

The new painting facility is expected to play a pivotal role in elevating Qatar’s status as a global leader in aviation services and technology.

Hamad International Airport (HIA) in Doha has implemented a major upgrade to its e-gate system, now allowing children to use this advanced, automated immigration technology, significantly improving the travel experience for families.

According to Captain Ali Ahmed Al-Kuwari of the Airport Passports Department, children aged seven and above and measuring between 120 and 130 centimeters in height are eligible to use the e-gates, provided their passport or Qatar ID contains a clear, system-registered photo for facial recognition.

This move is part of HIA’s broader strategy to create a smart, secure, and family-friendly travel environment, reflecting Qatar’s commitment to world-class passenger service and technological innovation.

The e-gates, located in both departures and arrivals, utilize state-of-the-art biometric technology, including iris scanning, ten-print fingerprinting, and facial recognition, enabling a fully automated process that eliminates the need for manual checks and dramatically reduces waiting times. The system is contactless, enhancing hygiene and convenience, and is especially beneficial for frequent travelers and families who can now bypass traditional immigration queues.

For young travelers, only the second-row e-gates are operational, and airport staff are present to assist families, ensuring a smooth and safe process. Parents or legal guardians must secure travel authorization for their children via the Metrash mobile application before travel, ensuring compliance with legal requirements and seamless processing at the e-gate.

Officials recommend that children pass through the e-gate first, followed by their parents, to maintain an orderly and safe flow, particularly during busy travel periods.

The introduction of e-gate access for children is a strategic step in Qatar’s vision to become a global leader in smart travel and digital transformation. HIA, recognized as the World’s Best Airport in 2024, continues to set new standards in passenger convenience and efficiency, with the e-gate system standing out as a key innovation that supports faster, safer, and more efficient border control.

If any biometric scan fails, airport staff are readily available to assist, and travelers can be directed to manual immigration if necessary, ensuring that the process remains smooth for all passengers.

This initiative not only streamlines the immigration process but also underscores HIA’s dedication to leveraging technology for a superior travel experience, making it easier and more enjoyable for families to travel through one of the world’s leading airports.

Qatar Airways is preparing for a prominent appearance at the 55th Paris Air Show, which will take place from June 16 to 22, 2025, at the Parc des Expositions de Paris-Le Bourget, the world’s largest aerospace event. The airline will join 2,500 exhibitors from 48 countries, with more than 150 aircraft on display and 3,000 attendees expected, underscoring the global significance of the show.

One of the headline attractions from Qatar Airways is the UEFA Champions League livery Boeing 777, specially dedicated to Paris Saint-Germain’s triumphant return as European champions. This aircraft not only celebrates the airline’s partnership with PSG but also highlights its commitment to sports and global connectivity.

In a major industry milestone, Qatar Executive—the airline’s private jet charter division—will present the Gulfstream G700, marking the first time this ultra-long-haul, fuel-efficient jet is operated in commercial aviation. The G700 is renowned for its exceptionally spacious cabin and advanced technology, reflecting Qatar Airways’ focus on luxury and innovation in private air travel.

Qatar Airways will also unveil the Qsuite Next Gen, the latest version of its award-winning business class product. Show attendees will be able to step inside the reimagined Qsuite and experience a variety of customisation options designed to offer a highly personalised and premium journey.

A highlight of the airline’s digital innovation is Sama, the world’s first AI-powered cabin crew, now enhanced to communicate in French, English, and Arabic. Sama will be available via WhatsApp, providing real-time, multilingual support for flight bookings, destination recommendations, and general passenger inquiries. This expansion is expected to connect with millions of French-speaking travelers and streamline customer interactions across key markets.

Visitors can further immerse themselves in the Qatar Airways experience at the specially designed L’Univers Qatar Airways Pavilion, located in front of Gate 0 near Hall 5. The pavilion features interactive exhibits, the latest Economy Class and Diptyque Business Class amenity kits, bespoke dining ware, and a celebration of PSG’s iconic victories. Guests can unlock exclusive gifts by scanning codes at key touchpoints, deepening their engagement with the airline’s offerings.

Qatar Airways Group Chief Executive Officer, Engr. Badr Mohammed Al-Meer, emphasized the airline’s dedication to innovation and diversity, noting that the Paris Air Show provides a unique opportunity to connect with the global aviation community and showcase products that define the Qatar Airways passenger experience.

The airline’s presence at the Paris Air Show comes on the heels of a record-breaking financial year, with Qatar Airways Group reporting its strongest profits to date—QAR 7.85 billion (US$2.15 billion) for the 2024/25 fiscal year, reflecting its robust growth and leadership in the aviation sector.

With several new offerings yet to be revealed, Qatar Airways’ participation at the Paris Air Show is expected to set new benchmarks in passenger experience, digital innovation, and luxury travel, reinforcing its position as a global aviation leader

In a bold leap toward environmental leadership, Ras Al Khaimah International Airport (RAK Airport) is integrating cutting-edge sustainable technologies as part of a major terminal expansion—becoming the first airport in the Middle East and Asia to adopt DYNAES’s revolutionary thermodynamic energy efficiency system.

This milestone initiative is more than a technical upgrade; it’s a statement of intent. With Ras Al Khaimah’s tourism and economy rapidly accelerating, airport authorities are ensuring that growth goes hand-in-hand with sustainability. The move reflects a broader commitment to reducing environmental impact while meeting rising air travel demands.

Cooling Innovation, Warming Planet's Hope

Recognizing that air conditioning systems account for some of the highest energy consumption in airport operations, RAK Airport—guided by consultants ARTELIA Airport and STG Contracting—has turned to DYNAES’s breakthrough technology, first unveiled at Dubai COP28. The system’s installation in the terminal extension marks a regional first.

“Sheikh Salem bin Sultan Al Qasimi, Chairman of the Ras Al Khaimah Department of Civil Aviation, highlighted the vision behind the move: “RAK Airport joined the Retrofit Energy Program in 2023. Now, we are proving how even older infrastructure can lead the way in sustainability.”

Developed alongside leading scientific institutions including Mines Paris PSL, TÜV, and CNRS, DYNAES’s patented system enhances thermal performance without increasing compressor power or requiring complex electronics. It works by optimizing the interaction between refrigerants and lubricating oils in air conditioning systems—delivering improved reliability, maintainability, and energy savings.

Professor Assaad Zoughaib of Mines Paris PSL called the innovation “a major scientific breakthrough in the field of thermodynamics.”

Big Impact, Low Footprint

The environmental potential is massive. If deployed globally, DYNAES’s system could slash carbon emissions by up to 7%—equivalent to the total emissions from the internet and air traffic combined. At RAK Airport, the technology is supported by seasoned partners Airchal and Takyeef Factory, ensuring a strong foundation for its regional rollout.

This technology boost also aligns with RAK’s broader goals of economic diversification and sustainable development. With a 28% rise in passenger traffic last year, the airport is rapidly scaling up. Recent route expansions include Air Arabia’s new service to Uzbekistan and planned connections to Kenya, Georgia, and India via IndiGo.

A Model for Green Growth

RAK Airport’s ambitious blend of infrastructure growth and environmental responsibility is setting a new regional standard for sustainable aviation. As the airport continues to grow as a vital hub for tourism and trade, it is doing so with an eye firmly fixed on the future—one where economic and environmental priorities go hand in hand.

Ras Al Khaimah may be a smaller Emirate, but with RAK Airport leading the charge in clean technology, it’s making a big impact in global sustainability conversations.

Etihad Airways has officially become a participant in IATA’s Turbulence Aware initiative, bringing its entire fleet-comprising nearly 100 Airbus and Boeing aircraft-into the programme. By doing so, every Etihad flight will now automatically feed anonymized, real-time turbulence data into a global network.

This development is set to further enrich the world’s largest database on in-flight turbulence, empowering pilots and dispatchers to make better-informed decisions about flight routes, thereby enhancing safety, comfort, and operational efficiency for all passengers and crew.

The Turbulence Aware programme is an aviation industry-wide collaboration that aggregates and shares precise, up-to-the-minute turbulence readings-known as Eddy Dissipation Rate (EDR) data-from aircraft operated by participating airlines, business aviation, and ground-based systems.

All the information is processed within seconds, ensuring that pilots, dispatchers, and operational teams can access the latest turbulence updates through their own flight planning tools, third-party apps, or IATA’s MET Viewer, a web-based interface that visualizes turbulence in vivid detail, including intensity, location, altitude, and relevant weather patterns.

The advantages of this programme are far-reaching. By providing objective, real-time turbulence data, Turbulence Aware helps flight crews steer clear of hazardous weather, uphold the highest safety standards, and reduce the likelihood of injuries among passengers and crew-an area of concern that remains a leading cause of in-flight incidents.

Furthermore, optimized routing supported by the programme leads to significant fuel savings, lower CO₂ emissions, and reduced operational expenses. The predictive power of the data also aids in minimizing aircraft wear and tear, which in turn helps decrease maintenance costs and increase fleet reliability.

With more than 2,600 aircraft now actively contributing to the data pool-and over 54 million turbulence reports generated in 2024 alone-the programme’s reach and data quality are rapidly expanding as additional airlines join the effort. Etihad’s involvement is especially significant, as it extends the programme’s coverage across the Middle East and all five continents it serves.

This ensures that pilots and dispatchers worldwide have access to the most accurate and timely turbulence information, supporting safer, smoother, and more efficient flights for everyone.

Captain Majed Al Marzouqi, Interim Chief Operations and Guest Officer at Etihad Airways, highlighted the airline’s strong commitment to safety, stating, “Having access to real-time, accurate turbulence data allows our pilots to make better decisions, resulting in smoother and more comfortable journeys for our guests.”

Kamil Al-Awadhi, IATA Regional Vice-President for Africa and the Middle East, also welcomed Etihad’s participation, emphasizing that timely, reliable turbulence data is key to improving flight safety and enhancing the overall passenger experience.

In essence, by joining the Turbulence Aware programme, Etihad Airways is not only reaffirming its dedication to safety and operational excellence but also playing a vital role in a global, collaborative movement to make air travel safer, more comfortable, and more sustainable for everyone involved.