When global warming caused by the action of us so we were supposed to be the one who solves the problem. Where problem solving is not difficult. Just change the behaviour that is destroying the world.
When global warming caused by our actions, so we were supposed to be the solution. The solution is not difficult. Just change the behavior that destroys the world.
When global warming caused by the actions of the US, so we should solve the problem. To solve these problems, it is not difficult. We change the behavior of destroying the world.