3rd Class Science Our Environment Protection of Environment

     Protection of Environment

Our planet is a beautiful one, with all the life supporting components on it. Air, water, soil, animals, plants etc. are called natural resources that form our environment. Among many components of environment, human being is the only one who has made environment dirty by polluting its resources i.e. air, water, land etc. Human has disturbed the food chain also.  

           Some Ways to Protect the Environment

Being the inhabitants of this planet, it’s our duty to protect our environment.

Look at the following picture to understand the method by which we can protect our environment:

      Which one of the following is not eco-friendly?

(a) Man cycling                                                                  

(b) Girl having leather bag                                   

(c) Lady throwing wastes in a pit                                 

(d) House having CFL in place of bulb                  

(e) All of these  

Answers (b)

Explanation

Leather bag is made from leather obtained by killing animal. Killing of animals for our own benefits would disturb the food chain and the immediate environment. Therefore, option (b) is correct and rest of the options is incorrect.

      Anand's mother cooks food by traditional chullah using wood. Whereas Ayush's mother prepares food from biogas. Whom do you think should be treated as friend of our environment.

(a) Anand's mother

(b) Ayush's mother

(c) Both of them

(d) None of them

(e) None of these

Answer: (b)

Explanation

Burning of wood releases lots of smoke in the air which causes air pollution. Inhaling such gases causes many respiratory diseases in the body. Biogas is a safe and clean fuel with respect to environment as it doesn't produces smoke and ash. Therefore, option (b) is correct and rest of the options is incorrect.

Limestone, sandstone and granite are used in the construction of buildings.

Limestone on more heating turns into marble.

75% of earth's land surface is covered by sedimentary rock.

The roots of trees can break rock.

Water keep changing from solid to liquid to gas in nature

Most of the world's water is in the oceans and is salty.

Frozen water forms the great ice caps at the north and South Pole.

Ice water and water vapor are different forms of water only.

Cold air weighs more than hot air.

We cannot see air.