> specially in Europe

The EU has much lower CO2 per capita than China. Hence why we're talking about US polluters.

> they chose to procreate

How evil of them. But considering that that's the reality now, it'd be absurd to expect China to have lower total emissions than the USA.

> if they think it's so important

Are you implying that you don't find pollution and climate change important? Do you have no empathy for future generations, or are you in denial about its effects?