human influences

Question 1

human carbon dioxide

Answer 1

burning off fossil fuels

Question 2

human methane

Answer 2

growing rice

Question 3

human nitrous oxide

Answer 3

use of fertilisers/transportation

Question 4

eutrophication

Answer 4

increased level of nitrates provide extra nutrients for algae on the surface of the river causing them to grow faster. blocking out the light and preventing plants below from phyotosyneising. the plant start to die, providing food for micro-organisms which increase in number and use up all the oxygen in the water
fish need oxygen so as less oxygen is available the fish start to die and their number decrease

Question 5

what’s the main cause of acid rain

Answer 5

internal combustion engines in cars and power stations

Question 6

acid rain

Answer 6

sulfur dioxide

Question 7

green house gass do

Answer 7

absorb energy that is radiated away from the earth and re radiate it in all directions, including back to earth