, it also covers:
Permanent conservation measures
water carried by the world rivers
freshwater resources as a proportion of the earths water
Water Use In Different Countries
Water Scarcity
The amount of water we use in our homes varies during the day
How to use water more efficiently
Nothing has had a greater impact on the world than water. Water has moulded its ancient landscape and influenced the pattern of human habitation from earliest times until the present. It will continue to influence people's lifestyle, prosperity and their relationship with the land.
America is a continent of extremes: of geography, climate, population distribution and water resources. It is the driest inhabited continent on Earth, with highly variable rainfall patterns. This variability means that America communities frequently face water supply and water quality problems.
Depending on seasonal conditions, American's use enough water every year to fill Sydney Harbour almost 50 times - between 18 and 22 million mega litres of water a year.
English: A poster for drinking water security from...
Drinking water 2. Remake by "River Nymph" of K.-M....
Česky: Pitná voda - kohoutek Español: Agua pota...(A mega litre is one million litres - about the volume of an Olympic-sized swimming pool.)
America stores more water per head of population than anywhere else in the world.
About one mega litre of fresh water is used each year for each of the 19 million Americans. This does not mean that each American uses a mega litre of water each year. Most use only a small fraction of that amount.
Most of this water is used for agriculture, especially irrigation, to grow food and other commodities for consumption in America and for export.
A topical issue for water authorities at the moment is the competing value of water between users and the environment and, in particular, the adverse effects of inappropriate use.
As a result, water extracted from the environment is increasingly...