How can there be a discussion of climate change when deniers focus on model details and do not understand that 1. CO2 is a green house gas and why; and 2. CO2 is being added by humans to the yearly cyclical CO2 budget in small accumulation? - John Walker

https://www.quora.com/How-can-there-be-a-discussion-of-climate-change-when-deniers-focus-on-model-details-and-do-not-understand-that-1-CO2-is-a-green-house-gas-and-why-and-2-CO2-is-being-added-by-humans-to-the-yearly-cyclical-CO2-budget/answer/John-Walker-922