We’ve shown that rapid, measurable progress is achievable in our cities. Here’s how that can now be replicated worldwide, say mayor of London Sadiq Khan and former New York mayor Michael Bloomberg ...

Sometimes, it's just the thought that counts. That's what Mitali Banerjee, a 28-year-old designer from Noida, says when anyone asks her if the oxygen therapy sessions she treats herself to actually ...

Gas stoves, furniture, carpets and cleaning supplies — these are just some of the many household items that can pollute our indoor air quality. So how can we keep the air in our homes clean and fresh?

Imagine being told you cannot go outside for the rest of the day, or the week. For children with asthma and other diseases, that is probably what the doctor should order. According to the World Health ...

For more than 30 years, my work has taken me into mines, labs and other places where technology meets nature. I’ve seen how the Earth builds its materials with remarkable precision, and how those same ...

Nitrogen is an essential element for living organisms, needed to build DNA, proteins and chlorophyll. Although nitrogen makes up nearly 80% of the air we breathe, it’s availability to plants and ...

Re “To Keep Plastic Out of Oceans, Start With Rivers,” by Boyan Slat (Opinion guest essay, May 28): When your bathtub is overflowing, what is the first thing you do? Find a mop or turn off the faucet?