Industrial hemp could be grown again in Wisconsin as part of a bill that’s getting a public hearing today (Tuesday). The state Senate’s agriculture committee is holding the hearing on a bill that’s cosponsored by lawmakers of both parties. It would seek to legalize the production of industrial hemp, which has low levels of the main ingredient in marijuana, and permits would be issued by the state Ag Department. The federal government banned the product in 1970. The current federal Farm Bill allows hemp research programs — and at least 30 states are allowing the crop for that purpose.