Don't blame climate change for the 39,000 forest fires now incinerating huge tracts of the Brazilian Amazon. This environmental catastrophe is human-made and highly political.
Brazil's new president could clear the way for plans to develop remote areas around the Tapajos River basin over the objections of the indigenous people who live there.
Pharmaceuticals were found in every invertebrate sampled from six Melbourne streams - including a waterway in a national park.
A big spill in Michigan's Straits of Mackinac could have devastating consequences. But does replacing the pipeline running beneath it make sense in a warming world?
Canada's national parks don't need more visitors. They could use more scientists, and better science, to help conserve the country's species.