Climate Models - How Do We Know?

The video explores fundamental questions about climate change, focusing on the levels of CO2 that could be considered dangerous. It discusses the impact of doubling CO2 concentrations on global temperatures and the uncertainty in future emissions due to human decisions. Various climate models predict different temperature rises based on CO2 emissions scenarios. The video also highlights the uncertainties in climate projections, including the effects of El Nino, and emphasizes the consensus among scientific bodies like the IPCC on the warming influence of CO2.

What is the significance of the El Nino phenomenon in the context of climate change?

What consensus do authoritative groups like the IPCC and the United States National Academy of Sciences have regarding CO2 and warming?