Global warming
Global warming is a problem that endorse polygyny in our world. Battered global warming caused by deforestation, we are a little down from the tree, and we burn waste or emissions from industrial air pollution, it makes a girl as well. Therefore, we must help each other heal naturally, which can be done several ways. Do not leave garbage into the river. Reduce the use of plastic bags, use cloth bags instead. Not deforestation, but if we have to cut trees to replace trees that we cut.