The best replacement for air pollution is water pollution.

The best alternatives to air pollution are rated as following:
★★★★★  water pollution
★★  cigarette smoke
★★  outdoor air pollution
★  second hand smoke
  outdoor pollution

Your alternative for air pollution is not listed? Suggest!
Speaking about air pollution, one probably shouldn't forget about factories.

Other search terms related to air pollution and their ratings are:
★★★★★ factories
★ coal
causes effects and prevention
You have in mind a companion for air pollution and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of air pollution in all years. Click on graph for more.
air pollution
water pollution
cigarette smoke