Useful products from respiration Bioethanol Sustainable Fermentation Biogas

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

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

Plants, yeast, and bacteria….

Are there alternatives? Bioethanol Are there alternatives?

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

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

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

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

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.

Biogas too! YUM!!! MEGA yum!!

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?

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