>I prefer the approach of improving energy efficiency (short to mid term time scale) and investing in greener energy sources (mid to long term) to bide us time until nuclear fusion becomes viable and thus electricity consumption no longer becomes a harmful process.

Raising efficiency probably won't help at all due to Jevon's paradox: https://en.wikipedia.org/wiki/Jevons_paradox

"""

In economics, the Jevons paradox (/ˈdʒɛvənz/; sometimes Jevons effect) occurs when technological progress increases the efficiency with which a resource is used (reducing the amount necessary for any one use), but the rate of consumption of that resource rises due to increasing demand.[1] The Jevons paradox is perhaps the most widely known paradox in environmental economics.[2] However, governments and environmentalists generally assume that efficiency gains will lower resource consumption, ignoring the possibility of the paradox arising.[3]

In 1865, the English economist William Stanley Jevons observed that technological improvements that increased the efficiency of coal-use led to the increased consumption of coal in a wide range of industries. He argued that, contrary to common intuition, technological progress could not be relied upon to reduce fuel consumption.

"""