First, the United States contributes more than its "fair share" of carbon emissions. We have more cars per capita than anyone else, and cars are a major factor

First, the United States contributes more than its "fair share" of carbon emissions. We have more cars per capita than anyone else, and cars are a major factor contributing to greenhouse gasses (arguably the single biggest factor). Second the lifestyle of individual Americans is, on average, much more energy intensive than other individuals in the world. There's our cars, like I already mentioned, but also the meat-heavy diet we have uses more resources (think of how much land is needed to sustain a cow vs how much grains, beans, or veggies the same land plot of land could produce), and the relatively large and single family homes many of us have take more energy to heat and cool. The very wealthiest Americans go much further and are huge contributers to climate change (privates jets, multiple large houses, yachts, private golf land, etc). Third, your point that western nations shift pollution to other countries is correct. If a state or nation enacts strict rules about industrial pollution, and a company decides to move their factories to another country with less regulation to save money, then there has been no reduction in emissions! But a country gets to claim they are clean, while their corporations continue to make profits and their consumers continue enjoy their gadgets that depend on dirty production. I think if we actually prioritized climate change over company profits, laws would be stricter about where a company could construct foreign factories. One other point I'd like to make is that shifting production around like this means that there is more shipping required in order to get raw materials to factories and finished goods to consumers. That also is energy intensive, which mostly means burning fossil fuels.