To start, you need to briefly discuss some of the impacts of climate change.
Then you should describe how policies "should" be implemented: the economic benefits should exceed the economic costs.
Then you should discuss some of the features of climate change that make this calculation difficult. See reading 1 for these.
These features include: slow, incremental damage that is hard to attribute to climate change; some agents will not see the benefits and so only care about the costs; regional variation in consequences; uncertainty about future trends.
You do not have to cover all these features, just a few.
What are the consequences of climate change in terms of temperatures, precipitation, and volatility
What are impacts of these consequences? For this you need the Carleton-Hsian paper (attached here as Reading 1)
What are the economic values of these impacts? For these you need to interpret the dose-response functions into dollars.
You do not have to list all the economic impacts of climate change, just a few (at least 3 but ideally a few more)