answer the following question in brief.
1. how does deforestation lead to frequent floods and droughts.
2. describe coal and its various products along with their uses.
3. why some fibres are called synthetic.
4. explain the history of discovery of cell.
5. describe the process of fertilization in human beings.
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1 Deforestation results in decreased water holding capacity of soil. This reduces the infiltration of water into the ground which causes floods. ... Scarcity of trees disturbs the water cycle and may reduce rainfall leading to droughts.
2 The most significant uses of coal are in electricity generation, steel production, cement manufacturing and as a liquid fuel. ... Steam coal - also known as thermal coal - is mainly used in power generation. Coking coal - also known as metallurgical coal - is mainly used in steel production.
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