> I used to think solar and wind power were the best ways to reduce CO2 emissions. But the biggest reduction in CO2 emissionsduring the past 15 years (over 60%)

> I used to think solar and wind power were the best ways to reduce CO2 emissions. But the biggest reduction in CO2 emissionsduring the past 15 years (over 60%) has come from switching from coal to natural gas. Sure, but that's not a long term solution. Eventually we will have to entirely rid the system of fossile fuels. Had we not invested in, an continued to develop wind and solar these last 20 years, and only focused on natural gas, would our chances to prevent global warming be any better? I don't think so. > I used to think that the world was transitioning to solar, wind, and batteries. This, too, was false. Trillionsof dollars were spent on wind and solar projects over the last 20 years, yet the world’s dependence on fossil fuels declined only 3 percentage points, from 87% to 84%. How much was invested in fossile fuel energy during the same period? Many times more! If investments in fossile energy continues at high levels, why would the worlds dependency on them decrease? You are too pessimistic about the outlook for solar and wind. There are problems with renewables such as variance in production. If nuclear is competitive let's us have some of that as well. No reason to only have one or the other.