Available Answers

1. 1.

   Tick the odd one out.

   1. Non-biodegradable waste

   2. Air pollution

    

    

2. 2.

   Match the following:

   Column I	Column II
   1. Landfills	(a) Rich in methane
   2. Biogas	(b) Burns organic wastes
   3. Compost	(c) Contaminates groundwater
   4. Incinerator	(d) Nutrient rich

    

3. 3.

   Mark the following statements as true or false:

   1. Greenhouse effect is a naturally occurring phenomenon.
   2. Oxygen is a greenhouse gas.
   3. Rise in sea level leads to flooding.
   4. Our activities have caused an increase in the level of greenhouse gases.
4. 4.

   Unscramble the following words related to acid rain.

   1. IRONTENG XDEOI
   2. SLUHPUR DEXOI
   3. LOSIFS SEFUL
5. 5.

   Give an example of a measure that can be taken for each of the following:

   1. Conservation of water
   2. Saving fuels
   3. Maintaining soil quality
6. 6.

   Fill in the blanks.

   1. The study of relations of organisms to one another and to environment is called __________________________.
   2. Biogas contains mainly __________________________.
   3. __________________________ and __________________________ are two greenhouse gases.
   4. __________________________ can be recycled.
   5. Everything that surrounds us forms our __________________________.