lesson 16-factors affecting the carbon cycle

Question 1

what happened in the Amazon from 2010-2020

Answer 1

droughts due to less evapotranspiration as a result of deforestation
->more wildfires ->more CO2

Question 2

how much carbon did the Oregon 2002 biscuit fire release?

Answer 2

1/3 of the annual carbon dioxide emissions from Oregon

Question 3

what happened in Saudi Arabia in November?

Answer 3

snowed for the first time

Question 4

how much carbon dioxide do humans emit through burning fossil fuels and changing land use?

Answer 4

30 billion tonnes per year

Question 5

what happens in terms of cycles when we burn fossil fuels

Answer 5

carbon moves from slow carbon cycle (trapped underground), to the fast carbon cycle

Question 6

what happens when humans change the use of forest land?

Answer 6

kill plants that would remove CO2, and may replace these with crops, which store less carbon

ploughing land allows oxygen to enter, allowing microorganisms to respire and decompose organic matter, releasing carbon dioxide

animals such as dairy cows release methane
-dairy cows produce the same amount of methane as 74 pigs