Moving our energy generation away from fossil fuels is central to reversing climate change.
Despite high growth rates especially in solar, renewable energy still represents only a small fraction of today’s global energy consumption. Renewable electricity generation (excluding hydro), is estimated to account for 8.4% of global electricity generation. Renewables do, however, play a significant role in the growth of electricity, contributing almost 50% of the growth in global power generation in 2017.
To get renewables to grow into their full potential we need a lot of work in energy storage and transmission to overcome to intermittent nature of solar and wind.
Another potential energy source that has a worse reputation than it deserves is nuclear. Nuclear in general and small reactors in particular could play a big role in reversing climate change if we can make nuclear politically feasible.