Stick a fork in, we're done.
It's impossible to solve all the problems. You can fix problems that have definite solutions. You first have to define the problem to even look for the solution.
Climate Change? Reducing emissions might help. Will it stop the temperature from changing? No. Many people don't believe in God. It's these people screaming the loudest. They believe in evolution. Well, according to scientists, much of earth was once frozen, and over the centuries it thawed. Well, it hasn't stopped thawing. There's just life on it now. We haven't changed the course of the earth. You can't change nature. You can destroy, rebuild it. But, you can't stop the sun from shining, the rain or snow from falling or the moon from rising. What could be done, would be to destroy every tree and plant in the world, and we'd die from lack of oxygen. Problem solved.
According to the film An Inconvenient Truth, there were catastrophes that were supposed to happen a decade ago that didn't. Many idiots like Greta claim the world is going to end in 2030. We have seven years to party it up. Another solution to the same problem. Party till the world ends.
Poverty? Religious bastardization? Crime? Hunger? Rape? Murder? Save the whales? Drug addiction?
Half the world has forgotten the difference between boys and girls, and you want to solve the world's problems. Good luck with that.