Why the country’s largest homebuilder is swapping out some wood for grass

Plantd makes carbon-negative building panels from grass. Homebuilder D.R. Horton just ordered 10 million of them.

Inside a warehouse in North Carolina, stacks of a new building material sit ready to be sent to D.R. Horton, the country’s largest homebuilder. The structural panels look like they’re made from timber—but they’re actually made from a fast-growing grass that helps make the final product carbon negative.