1. Listen to the passage and tick true or false to the statements


True
False

1
Non-renewable sources are being used up



2
Biogas is a new source of energy available for poor people.



3
Biogas creates a lot of smoke.



4
The new energy source is not costly.




2. Listen to the passage again and complete the sentences.

water pollution on the increase wind and the sun
cooking and heating Mountainous air pollution


1. People in …………………. areas have to gather wood to use as fuel.
2. Biogas helps solve the problem of indoor …………………………..
3.The use of renewable energy sources in developing countries is…………………. .
4. In the future, the……………  will be used as the main environmentally friendly energy sources.