1. Useful products from respiration
Bioethanol
Sustainable
Fermentation
Biogas

3. Anaerobic respiration in animals
Toxic!!
Run for your life!!!
Why might animals respire anaerobically?

4. Anaerobic respiration in plants
Waterlogged roots
Yeast – brewing and baking
Lactobacilli – cheese / yoghurt
When would a plant respire anaerobically?

5. Plants, yeast, and bacteria….

6. Are there alternatives?
Bioethanol
Are there alternatives?

7. Yeast are used to make bioethanol on a large scale from sugar
Bioethanol from sugar
Yeast are used to make bioethanol on a large scale from sugar

8. Task
Draw the diagram and use it to help you explain the process of fermentation in yeast

9. Remember sustainability?
Explain in your own words what is controversial with the production of biofuels?

10. Break down organic material in manure
Biogas
bacteria
To produce methane
Break down organic material in manure

11. Copy the diagram
Draw a flow chart to show how energy is transferred starting with the sun and ending with the conversion of methane in biogas. Explain and label each stage.

12. Biogas too!
YUM!!!
MEGA yum!!

13. How will we rebuild society?
Plenary
The end has come! Humanity as you know it is changed forever. There is no going back. Your unsustainable lifestyle has brought the end. The only resources left are:
A few pigs
Some plants
Bacteria
Containers
Stationary
How will we rebuild society?

14. Homework Hint: we BURN the methane
Extension: Draw the chemical formula for this reaction