Artifical filtering or natural biological processes.
Algae is a very small plant that is green so when you get enough of it in the water it makes the water look green
Have you heard there's a place that makes the water clean. And you can drink from clean streams and lakes but not oceans. Everybody knows that the ocean has salt water so if you drink it you can't stop and that not healthy.
if you drink alot of water it will asorb into the skin and makes it clean.
Yes this bench is water resistant, this makes it very easy to clean after a hard workout.
because more water has been polluted so they have to clean more water which makes the water bills increase
Because coal absorbs the coal molecules and that makes the water clean.
Well, if the water supply isn't clean, bacteria builds up and makes us sick and can give us diseases
They stop dirt erosion. This helps becuase dirt makes clean water dirty.
water vapor, which makes it a clean and environmentally friendly power source.
The Caribbean has very clear blue water because it is clean. This water has not been overly polluted by humans yet.
The animals in the water do indeed keep the river clean. These animals include filter feeders like fish for example.
clean water is when water is clean and there is no bacteria or bad stuff that can give you a infection.