2.
The matter that could not break down into simple substances by natural process is called _______materials.
3.
Such matters which become part of the soil after broken down by natural process into simple substances are called _______ materials. (Meat, paper, etc).
4.
The greenhouse is _______ inside even in winter season.
5.
The germs present in it caused typhoid;
6.
The invisibility in winter is due to _______.
7.
Which one of the following acts causes most of the air pollution?
8.
There are _______ types of environmental pollution.
9.
Which one of these is non-biodegradable?
10.
Which of the following is not a greenhouse gas?
11.
_______ were formed from the buried remains of plants and animals.
12.
The increase in the average temperature of the Earth is called _______ warming.
13.
The particular place where an organism lives is called its _______.
14.
Greenhouse is a house made of _______ material.
15.
The poisonous substances emitting form the chimney of the factories and smoke after dissolving in rain water produces _______ rain.
16.
Pollutant gases in air combine together in presence of sunlight and produce _______.
17.
The substances that cause pollution are called _______.
18.
Carbon dioxide, methane, nitrogen oxide, etc. are called _______ gases.
19.
To reduce pollution of non-biodegradable things the principle of _______ is applied.
20.
The green houses gases allow the sunlight to reach the Earth, but does not allow leaving the heat of the Earth, this process is called _______ effect.
21.
_______ gases are considered fossil fuel.
22.
Any change in the environment which is harmful for living thing is called environmental _______.
23.
Which disease is caused due to air pollution?
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