Further on this...
If we're to rely more on zero emission clean energy, then we need to build the infrastructure. Part of this is facilities like we have at Dinorwig - a pumped storage hydro power station - these allow storage of electricity from high output times (daylight, or favourable wind conditions etc) and release at times of high demand or low output.
All the "what about China" nonsense here and elsewhere in US Republican echo chambers ignores that China has a per-head CO2 output of about 2/5ths of USA and about the same as the UK. And they're investing in renewables at a rate the rest of the world should take notice of. Have a look at the list of pumped storage hydro plants under construction:
https://en.wikipedia.org/wiki/List_of_pumped-storage_hydroelectric_power_stations#Under_construction
They're doing something about it, but the rest of the world isn't. That's why we need Greta and people like her, and why the muppets with all the "what about China" bull-crap should be a little more reflective.
Worth remembering that much of China's CO2 is because it exports to the world - really, we're exporting our C)2 to them by producing our consumables there.