ALTERNATIVE ENERGY SOURCES. POLLUTION AND POLLUTION SOURCES
Common work by the participants of etwinning project "HAND BY HAND TO SAVE OUR LAND"
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CONTENTSLoading...
Alternative energy sources..............31) Water..................................................4
2) Natural gas ........................................57
3) Solar energy.......................................65
4) Oil........................................................73
5) Air........................................................89
6) Coal.....................................................108
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Alternative energy generally refers to any group of non-traditional fuel sources that does not burn fossil fuels or use up any type of natural resources which will result in damage or harm to the environment. In other words “Alternative Energy” is clean energy, well at least in theory. Alternative energy sources provide many benefits over the use of the more traditional fossil fuels such as less harmful pollution and cheaper fuel prices.Loading...
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The water cycle in nature
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Sources of Fresh and Salt Water
•Water, water, everywhere .... "
•I have heard this phrase, and for water, it is true. The earth's water (almost) is everywhere: above ground in the air and clouds, on the surface of the earth in rivers, oceans, ice, plants, organisms and inland within a few miles of land.
•Global water distribution by the numbers
•The Earth holds about 326 million trillion gallons (326,000,000,000,000,000,000 gallons) of water.
•If you crunch the numbers, here’s the percentage in global water distribution of all these sources of water.
•Water, water, everywhere .... "
•I have heard this phrase, and for water, it is true. The earth's water (almost) is everywhere: above ground in the air and clouds, on the surface of the earth in rivers, oceans, ice, plants, organisms and inland within a few miles of land.
•Global water distribution by the numbers
•The Earth holds about 326 million trillion gallons (326,000,000,000,000,000,000 gallons) of water.
•If you crunch the numbers, here’s the percentage in global water distribution of all these sources of water.
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Oceans (97.2%)
Most of Earth is salt water in oceans. About 97.2% of Earth’s surface water resides in oceans. There are 5 oceans that surround continents.
The average depth of oceans is 2.7 kilometers so water volume is about 1,338,000,000 cubic kilometers. Oceans are foundation of water cycle.
Water moves continuously in nature in three stages: evaporation, condensation and surface runoff. Ocean currents are like giant conveyor belts moving huge amounts of water all the time.
Only 3% of the world's water is fresh. And 99% of this is either frozen in glaciers and pack ice or is buried in aquifers. The remainder is found in lakes, ponds, rivers, and streams.
Most of Earth is salt water in oceans. About 97.2% of Earth’s surface water resides in oceans. There are 5 oceans that surround continents.
The average depth of oceans is 2.7 kilometers so water volume is about 1,338,000,000 cubic kilometers. Oceans are foundation of water cycle.
Water moves continuously in nature in three stages: evaporation, condensation and surface runoff. Ocean currents are like giant conveyor belts moving huge amounts of water all the time.
Only 3% of the world's water is fresh. And 99% of this is either frozen in glaciers and pack ice or is buried in aquifers. The remainder is found in lakes, ponds, rivers, and streams.
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