As long as there is plants, we will always have air, and water just never runs out
usable water
Re usable
yes, enzymes are reusable.
Re-usable ones
A Brita water bottle is used for filtering water which will in turn make the water cleaner for the user to drink out of. It is also relatively cheap and re-usable as well as washable.
1% of water is usable in this case .Since only 3% of water is usable as fresh water, 2% is unavailable in frozen form leaving approximately 1% of the earth's water usable.
get the minerals,nutrients and other healthy nutrients from the unusable to make it usable water..
To be re-usable, you must be able to use it first. Thus, start to write a class that is usable, then we can talk about reuse.
learn to know how to recycle and reuse the used plastics
a space shuttle is re-usable
Because re-usable containers cut down on waste.
Any freshwater on Earth is usable