Like the development of global industry would have still emmited more greenhouse gases than the earth's ecosystem could handle.
But instead of 50 years of denying it and 10+ years of doing nothing about it it'd have been started on earlier.
Plus instead of having all the labor going into putting roller coasters on cruise ships it'd be going towards not destroying the globe for profit.
Socialism is necessary to solve the climate crisis, to the extent it still can be. We can't do it within the capitalist framework, that's for sure.
I wouldn't say it's sufficient, though. There will still be struggles under socialism and placing focus in something not immediately tangible would require a serious, coordinated campaign working against various parties' short-term interests.