Climate change is one of the most controversial global issues of the 21st century. In this topic learners will analyse patterns of climate change from the start of the Quaternary period to the present day, considering the reliability of a range of evidence for the changes. Learners will study the theories relating to natural climate change and consider the influence of humans on the greenhouse effect. Social, economic and environmental impacts of climate change at both local and global scales will be examined.

2.1 What evidence is there to suggest climate change is a natural process?

a. What evidence is there for climate change?

b. Is climate change a natural process?

c. Why is climate change a global issue?