Light can be considered pollution. Photo credit: NASA
Sound (loud noise) can be pollution. Photo credit: Purestock, Think. Stock. com
Sewage can cause pollution. Photo credit: Steve Spring, Marine Photobank
Pollution can be invisible—we cannot see fertilizer and pesticides. Photo credit: Chesapeake Bay Program, Flickr
Hot water can be pollution. Photo credit: FPL/Nuclear Regulatory Commission, Flickr
How does pollution get into the water? Heavy rain washes things from the land into places like lakes, rivers, and oceans. We call this “stormwater. ” Photo credit: Chesapeake Bay Program, Flickr
Polluted or Healthy? Sometimes it is easy to tell…sometimes it is harder. Photo credits: Maia Mc. Guire
How can we keep our water and air healthy? Recycle Throw trash away properly Ride a bicycle or walk instead of driving a car Use solar or wind energy instead of energy from power plants Photo credit (clockwise from top): Eyematrix, Wavebreakmedia Ltd, jehsomwang, iriselmo; Thinkstock. com