biofuels Flashcards
1
Q
how are biofuels made by natural products
A
fermentation
2
Q
how are biogases produced
A
anaerobic fermentation of a wide range of plant products of waste material containing carbohydrates
3
Q
levels of CO2 and methane in the atmosphere are increasing and contributing to global warming. an increase in the earths temperature by even a few degrees may cause:
A
- changes to the earths climate
- sea level rise
- reduction of biodiversity
- changes in migration patterns
- changes to the distribution of species
