Question
Fill in the blanks :
- Natural gas contains ____ % CH4.
- Forest wood is a ____ source of energy.
- The main constituent of gobar-gas is ____.
- Wind farms are located in ____ regions.
Answer
- Natural gas contains 70-90% CH4.
- Forest wood is a renewable source of energy.
- The main constituent of gobar gas is methane (CH4).
- Wind farms are located in windy regions.