Your president and a lot of US citizens don't even acknowledge that there is a climate change. You are far from any kind of leadership in that regard.

I think EU takes the initiative and is king in making the world follow. Either because they want to or simply because they have to.

Southeast Asia contains most of the world's people and a huge fraction of the world's GDP. Apart from China, however, it's uncoördinated. A small action by the United States means more than many large actions by smaller European states. This makes sense from game theoretic as well as simple sociopolitical perspectives. This is part of the package one takes when choosing the confederated structure the EU has opted for.

https://www.theguardian.com/environment/2017/mar/28/only-swe...

People can claim a lot about other countries and there is a lot of things we do shittier than others. But in fighting climate change, there is no better country than Sweden.

Since we can, you can as well. Taking leadership is possible as a little country. We can show you all that it is possible and that you can gain economical benefits from it. In Sweden, fighting climate change is a cultural thing like it should be in the entire world.