air pollution

Question 1

carbon monoxide comes from which process?

Answer 1

• incomplete combustion (without enough oxygen to form C02)

Question 2

name the two air pollutants humans cause:

Answer 2

carbon monoxide
sulfur dioxide

Question 3

why is CO bad?

Answer 3

• it permanently binds to haemoglobin
• in red blood cells
• instead of oxygen
• it is toxic

Question 4

how is CO produced by humans?

Answer 4

• burning fossil fuels
• car emissions

Question 5

how have we reduced the CO produced by cars?

Answer 5

using catalytic converters in cars
—> turns CO into CO2

Question 6

sulfur dioxide causes which environmental problem?

Answer 6

acid rain

Question 7

what is acid rain/ what causes does it have?

Answer 7

• acid rain can cause a lake to become more acidic
  —> organisms are very sensitive to pH, so they may die
• acid rain can kill trees
  —> damages leaves
  —-> releases toxic substances into the soil
  so they don’t get the nutrients they need

Question 8

how do humans cause sulfur dioxide?

Answer 8

• sulfur dioxide come from sulfur impurities from the fossil fuels
• fossil fuels are burnt
• as a gas, it mixes with rain clouds
  —> forms dilute sulfuric acid
• falls as acid rain

Question 9

name two human processes that cause sulfur dioxide?

Answer 9

• power stations
• internal combustion engines in cars