As for reducing carbon footprint, I think most European countries are lightyears ahead of USA. For things like mass transit, bicycling and compact living, Europe has us beat.
In spite of this, Europe is struggling more than us, given the Russia sanctions energy crisis. This is basically because the US has more fossil fuel production than Europe. Domestic fossil fuel production.
We are less dependent on imported energy which often comes from authoritarian countries. This hasn't always been the case. During the 1970s, USA was so dependent on imported oil that OPEC had us over a barrel. Since then, domestic production of oil and natural gas has increased in USA so it's closer to our domestic demand.
I've sometimes wondered if Europe could produce more of it's own fossil fuel. Not necessarily a desirable outcome in terms of climate change, however.
It is true that Europe is trying to ramp up alternative energy production and transferring it's fossil fuel imports to other sources besides Russia. Liquefied natural gas (LNG) for instance. Trying in short order.