bio-fuels

Question 1

difference between biofuels and fossil fuels

Answer 1

-biofuels mostly made from recently living organisms, such as plants and algae
-fossil fuels made from organisms which died millions of years ago

Question 2

how is energy released

Answer 2

plants and algae can trap the suns energy as part of photosynthesis, and this energy is released when we combust the fuel

Question 3

biofuels advantages

Answer 3

-easy to transport
-can be used in cars
-supposedly carbon neutral
-fairly reliable

Question 4

biofuels disadvantages

Answer 4

-high cost to refine
-can’t respond to immediate energy demands
-require a lot of energy to harvest, process and transport
-require a large area of land to grow
-release pollutants

Question 5

carbon neutral

Answer 5

absorb the same amount of carbon dioxide while growing, as they release when they’re burned

Question 6

in reality why aren’t biofuels carbon neutral?

Answer 6

-trees may be cut down so don’t absorb carbon dioxide
-trees may be cut down and will release carbon dioxide if burnt
-energy required to harvest, process and transport
-which releases more carbon dioxide