This document discusses various pollution problems affecting both the environment and human health. It notes that almost everyone contributes to air pollution and provides examples of pollution's impacts like fish dying in China's Donghu Lake and people contracting diseases from pollutants. It also explains that cars burning gas release exhaust into the atmosphere and mentions efforts to curb pollution through developing more eco-friendly vehicles that use less gas or electricity. The document stresses the importance of reducing littering and developing advanced vehicles to help address global warming caused by the greenhouse gas effect trapping gases in the atmosphere.