(Courtesy Rep. Cynthia Thielen)

A hemp American flag flew over the Hawaii Capitol at the opening of its legislative session Wednesday.

The flag raising was sponsored by Rep. Cynthia Thielen (R), who co-sponsored a 2013 bill legalizing hemp in the state. The flag was made by Colorado hemp advocate Michael Bowman.

Thielen said in an e-mail to The Washington Post that the bill has allowed the University of Hawaii to study hemp’s use as a bio-fuel, and she hopes hemp can be used as a building material, known as hempcrete.

“Up till now, we have had to import our building materials,” she said. “When we start large scale hemp agriculture, we can ‘grow our houses from the soil.'”