Human beings are definitely the biggest culprits when it comes to air pollution. They put things into the air that they should not. They are the ones who run the factories that spew out toxic waste and smoke and fumes. They are the ones who drive cars, busses, airplanes, and all vehicles that put out emmissions and pollute the air. They also invent the things that ruin the air and smoke cigaretts and use aerosol sprays.
Humans try to make crops better by spraying things on them to make them grow faster and to control the soil and the bugs but that too backfires on us. Plastic is an invention that is killing our air too. Humans are the biggest cause of air pollution but not near enough is being done about it. There are some measures being taken, but not enough. There needs to be more laws about air pollution, world wide. Even the organizations that are set up to do somethign are really a waste of time and a waste of money.