If we don't do anything, yes. we already have the solution for energy, it's only a question of building enough windmills right now and research more advanced energy extraction at the same time. 20 percent of energy in my country is from sustainable green tech. right now. Why not just copy paste.
sweden has a goal of 49 percent green energy in 2030, this progress could be continued till approximate 100% in less than 60 years, at current rate.
But, accelerate it, raise taxes on companies that sells unnecessary products to pay for it the investment.
"The first thing Fascists usually try to do is silencing the opposition."