Boil-over.

The article features environmentalist and author Bill McKibben, who has been tweeting, organizing and blogging, as well as getting arrested and becoming the biggest threat for Big Oil. It discusses various environmental actions takern by McKibben to raise awareness on climatic change and its impact on the environment and people. It states that McKibben focused on the involvement of young people in his environmental campaigns on global warming and other signs of climatic changes.