Climate Change

Question 1

State the types, durations and temperature change of milankovitch cycles.

Answer 1

Eccentricity-100,000 years- 5-6°c
Axial tilt-41,000 years- 2-3°c
Precession- 26,000 years- 2-3°c

Question 2

State the alternative causes of climate change, excluding milankovitch cycles.

Answer 2

Eruption Theory- dependant time period- 0.4-0.7°c change of temp
Solar activity- 11 year periods

Question 3

Evaluate international agreements as an effective mitigation method.

Answer 3

Example: 2015 Paris agreement, 190+ countries, reducing emissions pledge.
Explain: This should create a reduction in fossil fuel burning which could reduce the effects of climate change
Evaluate: This is not legally binding so countries can opt out (eg. USA) and poorer countries will struggle to implement this.

Question 4

Explain Alternative Energy Sources

Answer 4

Wind, solar, geothermal and nuclear energy sources.
UK aims to produce 15% of energy from renewable sources.
Reduces emissions massively if 100% renewable energy is used. However this is very expensive.

Question 5

Explain Carbon Capture+storage

Answer 5

Capturing 90% of carbon emissions from fossil fuel burning. CO2 is out into the ground. Very expensive and requires energy to put into storage.