Q39 of 71 Page 470

Parineeta and Vivek were commenting on the increase in power rates by the Electricity Board. Parineeta said, "the Electricity Board was raising the tariffs almost every six months. Why is this happening?" Vivek said, "the consumption of power is increasing and its production is becoming costlier because of the increase in the price of fuels. We must do something to check its consumption."

What will happen, if we do not adhere to controlled use of power?

If we do not adhere to controlled use to power, there will be continued loss of natural resources such as coal and water.


Let’s try to understand:


● Coal is used to generate electricity in power plants. Coal plants are ineffective as only 35 percent of coal's energy is made into electricity in coal-based power plants. The rest is lost as heat.


● Coal burning in power plants uses huge amounts of water to create steam for turning its turbines.


● Burning coal causes smog, acid rain, global warming, and air toxics. All these pollute the air.


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38

Give reasons for switching over from fossil fuels to other sources of energy.

 39

Parineeta and Vivek were commenting on the increase in power rates by the Electricity Board. Parineeta said, "the Electricity Board was raising the tariffs almost every six months. Why is this happening?" Vivek said, "the consumption of power is increasing and its production is becoming costlier because of the increase in the price of fuels. We must do something to check its consumption."

Suggest some ways to limit the consumption of power.

 40

Meera and Radhika were on a trip to Mussoorie. They set out on a short trekking on the hills. They were closely watching the flora and fauna in the area. They felt that the area has sufficient biodiversity. This was possible because the forests had remained safe.

There was no visible sign of cutting of trees. Meera said with pride to Radhika, "do you know women have played a prominent role in the protection of forests? Without their brave acts, the situation would have been different and miserable."


Name two incidents from history when women environmentalists saved the trees from falling by greedy and powerful people.

 40

Meera and Radhika were on a trip to Mussoorie. They set out on a short trekking on the hills. They were closely watching the flora and fauna in the area. They felt that the area has sufficient biodiversity. This was possible because the forests had remained safe.

There was no visible sign of cutting of trees. Meera said with pride to Radhika, "do you know women have played a prominent role in the protection of forests? Without their brave acts, the situation would have been different and miserable."


What is meant by biodiversity?