Renewables solves this.
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Gas power generation is a necessary evil to balance out the variability of intermittent energy generation (i.e. wind and solar).
Hydropower isn't a feasible alternative because the easy resources have been developed.
The only alternative source of flexibility available today is demand side response.
Edit: I appreciate the down votes, as I've not explained in detail. It is a complex issue. My opinions are based on having a phd in the topic, 10+ years in control rooms, years of market operations and design, and years contributing to europe-wide risk assessment methodologies.
I emplore anyone who is actually interested in how energy mix actually impacts grid stability/reliability to look into the Eirgrid DS3 programme (https://www.eirgrid.ie/ds3-programme-delivering-secure-susta...).
China is heavily reliant on coal.
The US Grid is presently less carbon intensive than the Chinese grid.
Agreed they are. But they want to move away from it, especially for air quality reasons. They've had a huge problem with air pollution. They are big into EVs. This means less reliance on foreign oil and cleaner air.