So, I may be a "doomsayer" (I consider myself a realist), but I'm always trying to see if there's a solution to getting us out of the mess we're in. Perhaps I would describe myself as an optimistic pessimist. Anyhow, based on my recent research, here are some of the solutions I think we (humanity) should pursue collectively...
Plug up the #MethaneLeaks! Seriously! That's a big part of the problem!
Make the price of #meat expensive! I remember when having meat was considered a special occasion -- not a daily occurrence.
Make things out of #RomanConcrete. Now that we've cracked the recipe, there's no excuse not to use it! Especially with rising sea levels (Roman concrete holds up better when exposed to water).
Manufacture stuff that lasts! No more #PlannedObsolescence -- items that can't be upgraded and/or repaired by a skilled user or a local repair shop!
Utilize new (and ancient) technologies to the max! #SolarPrisms, reflective white paint, building new structures with #skywells, #geothermal and other ways to cool/heat spaces without using #FossilFuels!
That's just a few off the top of my head. I think a lot of the solutions are right in front of us -- but #greed and #Oligarchy are keeping them from being implemented!