Friday, September 19, 2008

Forests

A third of the world's land surface consists of forest-ares of land covered by dense tree cover. Each forest is an ecosystem- a group of animals and plants interacting with the physical environment and one another. More plants and animals live in forest than in any other environment. Forests differ according to the climate-boreal, temperate, or tropical. They help maintain the Earth's natural balance; trees absorb and release gases which regulate the climate.

Tuesday, September 16, 2008

Storms


A storm is any disturbed state of an astronomical body's atmosphere, especially affecting its surface, and strongly implying severe weather. It may be marked by strong wind, thunder and lightning (a thunderstorm), heavy precipitation, such as ice (ice storm), or wind transporting some substance through the atmosphere (as in a dust storm, snowstorm, hailstorm, etc).
Storms are created when a center of low pressure develops, with a system of high pressure surrounding it. This combination of opposing forces can create winds and result in the formation of storm clouds, such as the cumulonimbus. Small, localized areas of low pressure can form from hot air rising off hot ground, resulting in smaller disturbances such as dust devils and whirlwinds.

Wednesday, September 10, 2008

Clouds


When you look up at the sky, you may see clouds. In temperate or mild climates, there are usually at least a few clouds and, sometimes, cloud cover is total. Clouds are dense masses of water drops or ice crystals so light and small that they float on the air. Clouds form when rising air cools to a point where it can no longer contain its water vapour, and so the vapour condenses. There are three basic forms, or shapes, of clouds- puffy cumulus, layered stratus, and feathery cirrus- but each form can vary to make many different cloud types. The type of cloud depends on how high the air rises and its temperature.

Thursday, September 4, 2008

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Tuesday, September 2, 2008

Biodiesel from algae


In the beginning, there were algae, but there was no oil

Then, from algae came oil.

Now, the algae are still there, but oil is fast depleting

In future, there will be no oil, but there will still be algae

So, doesn’t it make sense to explore if we can again get oil from algae?

Source : http://www.oilgae.com, MCT photo Service