Starting Monday, world leaders from close to 200 nations will gather in Paris for two weeks to try to come up with a global agreement to tackle climate change.
The goal is to get all the nations working together to limit the rise in temperature to 2C, through a variety of means including carbon emission cuts and the creation of a $100-billion fund to help developing countries adapt to and deal with the impact of climate change.
While most observers agree that the economic impact makes mitigating climate change a global priority, some critics feel that there are cheaper -- and more efficient -- ways to achieve the same outcomes.
Adele Morris, senior fellow and the policy director for the Climate and Energy Economics Project at the Brookings Institution
Bjorn Lomborg, director of the Copenhagen Consensus Center, a think tank based in Massachusetts. He is the author of numerous books, including “The Skeptical Environmentalist” (Cambridge University Press, 2001)