Climate change models have been a key tool to project what could happen with global warming in the future. But there’s a debate in the scientific community and some are saying too much emphasis has been put on the worst-case scenarios. Others argue that the impacts of climate change are too unpredictable and all scenarios, even the most serious, less likely ones, need to be kept on the table.

All agree, though, that human-induced climate change is happening and that even the most likely projected temperature increases will be serious and potentially very damaging.

Presenter: Ruth Alexander Producers: Xavier Zapata and John Murphy

(An iceberg that broke away from a Glacier in the Southern Patagonian Ice Field which is experiencing high rates of melting. Credit: David Silverman /Getty Images)