The sun is the source of all energy either in the form of fossil fuels or wood. After all, these substances have made from the energy of the sun and have stored energy. However, the heat of the sun can be used directly in the form of solar energy. Solar cells and giant solar plants are used for generating electricity. it has been estimated that the solar energy reaching the Earth's surface in one year is double than we will ever receive from all the Earth resource of coal, oil, natural gas, and uranium together. Solar Plant In China How can we capture the heat energy of the sun? The easiest way to capture the heat energy of the sun is to heat water. In countries with a regular supply of abundant sunlight, the roofs of the houses have tanks with water that gets heated by the sunlight. 'Solar houses' can now be seen in various countries across the world. Solar collectors are placed on the roofs of these houses, whic
The steppes and the savannas are the great grasslands of the earth. Savanna grasslands lie between the tropical rainforest and the deserts in the northern as well as the southern hemisphere. Trees like the acacia and the water storing baobab grow in the savannas. In addition to these plants, gnus, giraffes and antelopes are found here. countless flamingos stand in the sea and one can see bald-headed vultures in the sky. In contrast, the steppe grasslands like the pampas of South America and prairies of North America are found in the middle of the continents. They are dry, devoid of trees, and cold in winter. Do Bison still exist in the prairie? Today there are around 4000,000 bison in the Northamerica steppes, but they had almost become extinct about 120 years ago. At that time the few remaining animals were transferred to the Yellowstone National Park in North America to protect them. Bison look docile Bison are nomadic grazers and are usually peaceful, unconcerne