China accounts for 30% of global emissions and, granted the states is half that, but they are still number 2. Also, the per capita number suggest that it would be easier for the individual to make a difference in the states.

Arguably a lot of China’s emissions come from industry. As America has outsourced a lot of it’s Industry to places like China these emission stats are probably somewhat warped.

https://www.worldometers.info/co2-emissions/co2-emissions-by-country

I disagree that the main reason is thermal runaway. It is more likely to be underrated components that can’t handle the current. This would not be immediately apparent and does usually come from lower quality printers.

Voron allow you to configure a printer and the provide a spreadsheet suggesting the sources for buying the parts. They aren’t region specific but most of the vendors are multinational.

This is my course of action with anything I buy.

1. Is there an ethical source
2. Is there a second hand source
3. Is there a EU company that may source the manufacture in China
4. Rarely, buy the Chinese one