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 ...

Summertime often means soaring, dangerous temperatures. Recent heat waves in Europe brought government warnings, power plant shutdowns, restrictions on automobile use, heat stroke and deaths. But misery in Europe and elsewhere is compounded by the chemistry of how emissions from ...

Most of the rising global attention to air pollution focuses on the impacts that ozone, particulate matter and other pollutants have on human health. This is natural; the numbers in the headlines are striking. The World Health Organization (WHO) estimates that ...

Did you know that air quality is a major contributor to global warming? Or that poor air quality can reduce sunlight, disrupting rainfall patterns, depressing crop yields and diminishing solar energy output? Did you know air pollution is the biggest ...

The original version of this text appeared in the International Finance Corporation analysis, “Climate Investment Opportunities in Cities.” Air pollution is the world’s fourth-leading fatal health risk and the top environmental health risk. One in nine deaths globally are attributed ...