Environmental problems with crude oil

Question 1

What happens when there is limited oxygen when burning fuels?

Answer 1

Incomplete combustion occurs and carbon monoxide is released.

Question 2

Sulfur dioxide causes….

Answer 2

Acid rain

Question 3

How can sulfur emissions be reduced and what is the problem with doing this?

Answer 3

Sulfur can be removed from fuels before they’re burnt but it’s more expensive.

Question 4

What is the problem with increasing carbon dioxide in the atmosphere?

Answer 4

Carbon dioxide causes climate change.

Question 5

How is ethanol made? State one pro and con of ethanol.

Answer 5

By fermentation of plants.
One of each of the below:
1)Pros: Carbon neutral, renewable
2)Cons: Isn’t widely available, engines must be converted before they’ll work with ethanol

Question 6

How is biodiesel made? State one pro and con of biodiesel.

Answer 6

Produced from vegetable oils.
One of each of the below:
1)Pros: Carbon neutral, less sulfur dioxide
2)Cons: Expensive, can’t produce enough to replace diesel

Question 7

How is hydrogen gas made?

Answer 7

From electrolysis of water
One of each of the below:
1)Pros: Very clean
2)Cons: Special and costly engine, isn’t widely available