11.  Diatomaceous earth filters use granules composed of the skeletal remains of fossilized marine life, frequently referred to as diatoms, to clean the water.

12.  Experts say that far too many chemicals are still needed to clean the water today.

13.  Few have access to clean water.

14.  He has pledged to bring foreign tourists to the country along with electricity and roads and clean water.

15.  In return, the communities have pledged to be partners instead of antagonists in the fight to clean the water that drains from their hills toward city taps.

16.  In those rural regions, peasants have less access to clean water.

17.  Minnows and tiny clams were placed in tanks with sediment samples and clean salt water.

18.  Only about half the people have access to clean water.

19.  Others have severe diarrhea because they do not have access to clean water, and they live in ramshackle houses that have no sanitation.

20.  Outside cats are usually OK with high temperatures, as long as they can find a shady spot to hide in and have access to clean water.