IIRC, hemp was farmed enormously in the US around the early 1900s. Rayon, developed by Dupont, was becoming commercially successful and the Duponts (along with the Hearsts who owned much of the news and advertising outlets) launched campaigns agains hemp and in favor of Rayon. So the entire hemp plant, along with the tetrahydrocannabinol-containing cannabis, were illegalized.

That's nothing. I've been doing joint research for decades, man!

In 2018, about two dozen fissures opened on the Big Island and wiped out most of Leilani Estates south of Hilo in the Puna district. (I lived in Hawaiian Paradise Park and friends lost houses in Leilani Estates. Here's an article from May of that year: https://www.washingtonpost.com/news/post-nation/wp/2018/05/06/a-very-fast-moving-situation-lava-shoots-through-hawaii-neighborhood-as-new-fissures-form/) Another eruption would not be violent, like Mt. St. Helens, for instance, it would likely be another flow that goes to the ocean and creates more land. While slowly wiping out everything in its path on the way.