If we don’t act on climate change, we’re looking at a future with more refugee camps, malnutrition, diarrheal disease and asthma. Here’s why cutting out fossil fuels isn’t just good for the planet — it’s critical for our health, says global health expert Jonathan Patz MD MPH.

Smoke from wildfires contains thousands of individual compounds, including dangerous toxins like carbon monoxide and lead. An environmental toxicologist explains the threat that wildfire smoke poses to human health — and the safety measures you can take.

In one of the world’s most polluted cities, there’s a futuristic tower that sucks up smog, turns it into clean air, and filters out the smog particles so they can be turned into diamonds.