Why is it all about doing more and not about doing less? I sincerely doubt that a technological solution is possible that would not require any reduction/change in our current lifestyles. Where is the evidence that we only need a sufficient amount of science and engineering to prevent disastrous climate change?

Moreover, merely developing the technology is not necessarily enough to get it actually adopted. Lobbyists will fight to protect established interests from industries like oil and gas. There will be narratives about how such new technologies destroy jobs, in an attempt to sway voters.

Ultimately, not enough change is going to happen without political will. That is because fighting climate change is not going to make everyone happy. There will be losers, and there is never going to be some magical piece of technology that will let us have our cake and eat it too. Creating political will requires more than just clever engineering, and people like Greta Thunberg can help motivate and inspire large groups of people to create that political will.