Notes from the Ecological Scene
The Amazon rainforest has incurred 74,155 fires since January, an increase of 85 percent from last year.
Lake Tahoe, the clearest large lake in the United States, is losing its famed clarity because of algae growth.
July was the hottest month ever recorded on Earth.
Colombia declared a national emergency on 8 August because of a fungus that threatens to devastate banana crops.