World leaders are calling for the protection of the Amazon as massive fires continue to scorch the world’s largest rainforest, which produces about 20% of the oxygen on the planet. Andrew Miller, advocacy director for the conservation organization Amazon Watch, says the fires are worse now than in previous years as a direct result of far-right Brazilian President Jair Bolsonaro’s policies, which encourage exploitation of the Amazon for mining, logging and agricultural activity. “The people who feel the impacts directly are local indigenous communities,” Miller says.