Three years after the West African epidemic ended, the disease has resurfaced.
CFCs or chlorofluorocarbons were banned as part of 1987 Montreal Protocol - but it looks like CFC-11 is being produced again.
Between 2013 and 2016, more than 4,000 Indians lost their lives to hot weather, at a conservative estimate.
The Dukha fear their way of life is at risk as the government imposes a strict ban on illegal hunting.
Their ability to go places that we can't could become invaluable in saving the planet.
There's a strong connection between location and economic stability.
Can they be decoupled?
Recent photos from NASA highlight the activity on our seas.
Whey left from making cheese transforms into sauce for potatoes, while bread crusts become miso soup.
The "human footprint" on our environment is becoming even more noticeable as protected areas are at risk.
To tackle shrinking coastlines, the state of Louisiana is using the Mississippi river to build new land.
A project on Mount Boutmezguida is using specially designed nets to pull drinking water from clouds of fog.
As tempers rise, deforestation could be another unwelcome side effect of an international trade war.
New research shows that sacred natural sites maintain high levels of biodiversity as their surroundings become degraded.
New data shows that everyday Americans are seeing the effects of global warming.