B2.14: Humans And Pollution

Question 1

What is exponential growth?

Answer 1

Means that the more indivduals there are in a population, the faster it grows

Question 2

What effects are there of the worlds population increasing?

Answer 2

• shortage of food is some countries
• more land is used for farming and buildings
• more pollution is being produces
• worlds resources are being used up too fast

Question 3

Human influences on the environment through agriculture?

Answer 3

• use of fertiliser
• use of pesticides
• loss of habitat
• deforestation
• monoculture
• animal waste

Question 4

Human influences on the environment through towns and industries?

Answer 4

• loss of habitat
• quarrying and extraction of raw materials
• dumping of wastes
• production of toxic chemicals
• sewage

Question 5

Discuss the pollutant sulfur dioxide and nitrogen oxides

Answer 5

Source- burning of fossil fuels

Effects environment as it dissolves in rain to form acid rain:

• damages plant leaves
• acidifies lakes
• changes minerals available in water supplies
• causes bronchitis

Question 6

Discuss the pollutant carbon dioxide

Answer 6

Burining of fossil fuels

Dissolves in rain to form acid rain

Also a greenhouse gas which keeps more heat in the atmosphere, lading to global warming

Question 7

Discuss the pollutant CFCS

Answer 7

Aerosols and refigerator coolants

Destroys the ozone layer in the upper atmosphere, allowing uv radiation through- skin cancers