Advantages Disadvantages
1. They are an alternative to fossil fuels. 1. species may become extinct
2. They do not use greenhouse gases 2. The land could be used for food
3. They do not release particulates when burnt
Biogas digesters produce biogas.
Continuous flow method
Methane/Carbon dioxide/hydrogen,nitrogen, hydrogen sulphide
Enzymes
Brazil uses gasohol, mixture between alcohol and biogas.
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