> We do have the technology. It's called nuclear energy.

No, we do not. Nuclear energy is by no means emission-free.

> There is no such thing as a zero- or close-to-zero emission nuclear power plant. Even existing plants emit due to the continuous mining and refining of uranium needed for the plant. Emissions from new nuclear are 78 to 178 g-CO2/kWh, not close to 0.

-- Mark Z. Jacobson, Professor of Civil and Environmental Engineering at Stanford University

https://www.leonardodicaprio.org/the-7-reasons-why-nuclear-e...

That's only part of the solution. Energy generation makes up ~25% of emissions, agriculture, manufacturing, transport, etc. make up the other 75%. All of these will increase as the 3rd world industrialises.