Company That Pollutes Too Much for Taiwan Is Turning to America

The countryside of St. James Parish, an hour west of New Orleans, is a hodgepodge of bayous and sugarcane fields, smokestacks and riotous tangles of steel pipe. Taiwanese conglomerate Formosa Plastics Group has a $9.4 billion plan to add a new landmark: a giant complex to make petrochemicals used in products such as playground equipment, drainage pipes, and artificial turf.

The company calls it the Sunshine Project. But environmentalists consider its arrival as anything but sunny, saying it could emit more than 13.5 million tons of greenhouse gases annually, equal to about 10% of the increase in U.S. carbon...