We discover the benefits of city trees and visit one of the world's largest urban farms in Paris. We learn about the dangers of smog for crops — and explore Nairobi on e-vehicles.
Environmentalists say Pakistan is particularly vulnerable to the effects of climate change, and government efforts addressing forests and greenhouse gas emissions do not go far enough.
Over 30 mayors from across the globe have pledged to deliver clean air for the 140 million people living in their cities. Delivering clean air on such a scale will take both ambitious targets and concrete action.
The world needs to drastically cut its carbon emissions by 2050 to head off the worst effects of climate change. A new report highlights how cities could make a huge difference with local green initiatives.
Nepal's capital, Kathmandu, suffers from some of the world's worst air quality, due to rapid development, the environmental engineer Bhushan Tuladhar says. How can the city in a valley be redesigned?
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