Sustainability 8.3

Question 1

Habitat Destruction?

Answer 1

• Gases put into the atmosphere causing bleaching in Great B Reef
• Removing the casing of the machine & leaving active parts exposed > collapse.

Question 2

Overcropping?

Answer 2

• When more animals are killed then being born (problem in aquatic species > overfishing).
• Whaling, killed faster than being born.
• Ecologists research allows new laws & regulations to be passed to stop this.

Question 3

Oil Spills?

Answer 3

It floats on surface of water because:

1. less dense than water
2. Oil can’t dissolve in water
   - Oil forms layer than stops oxygen and sunlight entering water.
   - 2010, oil rig leaked oil into Gulf, caused major destruction.

Question 4

Pollution? And Types

Answer 4

Any contaminating substance introduced to the environment that causes advert changes.

• Air
• Land
• Light
• Noise
• Water

Question 5

Air Pollution & Agriculture

Answer 5

• produce large amounts of methane as livestock digests grass
• Methane is 30 times more effective at trapping heat in atmosphere than CO2

Question 6

Land Pollution & Toxic Smart Phones

Answer 6

• Phones contain lead, cadmium & mercury

- When sent to landfill toxic chemicals leach out into groundwater > huge risk.

Question 7

Light Pollution & Turtle Hatchling Confusion

Answer 7

-beachside settlements look brighter than horizon so they venture to the land instead of ocean.

Question 8

Sound Pollution & Cetacean Communication

Answer 8

• Cetaceans (dolphins, whales, porpoise) reply on underwater sound.
• Sonar, propellers, explosives & construction interferes with communication.

Question 9

Water Pollution & the Great Pacific Garbage Patch

Answer 9

• Rubbish vortex between America & Japan, all trapped.

- Plastics break into micro plastics > hundreds of hears to break down.