This document discusses how rubbish can be turned into electricity through producing biogas via bacterial fermentation of organic waste from animals and plants. Biogas production has environmental advantages as it treats waste and generates renewable energy but may also have disadvantages such as requiring large areas of land to grow crops for fermentation.

1. How can we turn rubbish into
electricity?

2. One way…

3. What are the environmental
advantages to producing electricity
in this way?
Can you think of any
disadvantages?

4. The gas produced from the waste
of living organisms is called biogas.
Biogas is made by allowing bacteria
to ferment waste material from
animals and plants.

5. Biogas can also be made on a
large scale from the fermentation of
crops such as sorghum (a type of
grain) or wheat.
It can also be made on a small
scale….

6. Biofuels
 Good or bad?

7. Biofuels
 Good or bad?
Bugatti Veyron, using petrol 800Hp
Using bioethanol it can 1001Hp

8. Biofuels
 Good or bad?