Production is also international. German chemicals giant BASF's first plant outside of Europe was built in Texas in 1958, and as of late they've found Texas very attractive because of our low natural gas prices, feedstock costs are very important when you're making chemicals by the 100s of thousands of metric tons.

(Potential supply disruptions might also be an issue, seeing as how last time I checked Germany gets most of it's natural gas from Russia through pipelines going through Ukraine, and with the latter two being at war right now....)