New studies show the effect of climate change on fish in the Amazon, and find evidence that human impact on the rainforest goes back thousands of years.
Drought and unsustainable practices are placing forests at risk, yet they are crucial to the reduction of the greenhouse gas emissions that fuel global warming.
Between 1992 and 2012, humans were more responsible than natural causes for wildfires in the US, due to population growth, urban expansion and global warming.