Water, land, the air we breathe and several other entities can become polluted. Air pollutants may be natural or man-made and may take the form of solid particles, liquid droplets or gases. Water pollution can come from sewage treatment plants, factories, ships, agricultural runoff, mining activities and paved roads, and there are numerous other sources of different types of pollution.
We can always take action against pollution: in cleaning up what's existing and, more importantly, preventing more. We can do that by changing how we manufacture as well as how we behave: reduce how much you use, reuse what's left when you're done, and recycle what you can't reuse. Policy has been enacted in the U.S. to prevent and reduce pollution at its sources. (Source: EPA / Photo: Flickr)

Keystone pipeline spills 210,000 gallons of oil in South Dakota

Rare seahorses discovered in the River Thames

London to boot cars from its busiest shopping street

Going green when it's your time to go

Climate change is a 'public health emergency'

By 2030, electric vehicles will rule Paris' streets

10 rivers may deliver bulk of ocean plastic

10 examples of why the Superfund program matters

James Dyson wants to clean up on the electric vehicle market

Why are blue whales suddenly changing the frequency of their songs?

Why are dogs turning blue in India?

Moss could be a cheap way for researchers to monitor pollution in cities