Environmental Problems Flashcards
1
Q
Ethanol is a biofuel. It is made…
A
by fermentation and used to power cars. Often mixed with petrol to make a better fuel.
PROS:
- carbon neutral (CO2 when burnt is taken in by plants)
- water.
CONS:
- Ethonol fuel isn’t widel available.
2
Q
Biodiesel is a type of biofuel. It can be produced from…
A
vegetable oils. It is used to run diesel engine.
PROS:
- carbon neutral
- produces less sulphur dioxide and ‘particultes’ than other diesel or petrol.
CONS:
- can’t make enough to completely replace diesel
- Expensive to make
3
Q
Hydrogen gas can be used to power vehicles. You get it from…
A
the electrolyssi of water- but it takes electrical energy to split it up.
PROS:
- combines with oxygen in the air to form just water- so very clean.
CONS:
- need special, expensive engine
- isn’t widely available
- still need to use energy from another source to make it
- hard to store because it’s explosive.
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