If fossil fuels were the only thing causing CC, that would be a good plan.
Unfortunately, FFs aren't the sole problem. Possibly the worst, but certainly not alone.
Human activity has caused the CCrisis - all human activity.
Our over consumption of wasteful, needless products, our food system that relies on man-made fertilizers that pollute the natural world and farmed animals that require more destruction of the natural world for pasture lands ( having to feed 8B ppl certainly doesn't help), and worst of all, our economic system that relies on the pursuit money - at any/all costs as a means of survival.
The lockdown showed us how to respond to the CCrisis. The skies temporarily cleared and animals returned to urban areas. That was a good start, imo.
Alternative energy solutions?
All green washing scams.
Bc every one of them still requires that we explore for and exploit natural resources; killing off more of the diversity this planet evolved to thrive under.
We can have a healthy economy or a healthy planet but we can't have both. A booming economy means more destruction of the planet.
Want to tackle the CCrisis?
Cease the most harmful of human activity, and strictly curtail the rest.
Most of all, slash our energy use to the bare minimum needed.