Tamil Nadu state in south India suffers from seasonal extremes in water availability. Sometimes there is too much water, and in other seasons not enough. Chennai, the coastal capital of 10 million people, experienced a “Day Zero” crisis this summer, ...

High up in the stratosphere, naturally occurring ozone reflects solar radiation back into space, protecting people and the planet from harmful ultraviolet rays. But closer to Earth’s surface, rising ozone levels – formed when pollutants from a wide range of sources react ...

We know that air pollution is a big problem – for health, climate, food security and more. But there’s a difference between generally knowing that “we need to do something” and actually marshalling the allies, resources and power to act. Before we ...

U.S. states, cities and businesses are an essential part of the response to the global climate crisis – and their role is ever more crucial as the Trump administration moves to pull the United States from the historic Paris Agreement. ...

People and goods are on the move faster and farther than ever. All that movement comes at a cost – not just the sticker price of a new car, train ticket or shipping bill, but also an environmental cost. Transport, ...

Monsoon season has always brought torrential downpours to Gorakhpur, India, but the city has seen record-breaking rainfall in the last few years. Residents of the northern Indian city often find their streets submerged in water, their houses waterlogged. Stagnant floodwaters ...