The radio taxis group in london has decided to measure and reduce pollution that comes out of its 3,000 cars. air pollution is a major cause of which environmental problem?
climate change
pesticide poison
deforestation
forest fires

In the mid-1800s, how did american indians often react to the us government signing treaties with tribal chiefs to establish reservations? many american indians did not accept the treaties and resisted relocating. many american indians fought for land taken away by the dawes act. many american indians bought land in oklahoma from white settlers. many american indians accepted the treaties and relocated voluntarily.