This lump here is a building block made of hemp.

Now, hemp plants are a strain of Cannabis sativa, specifically subsp. sativa. This strain grows tall and narrow and has a very low tetrahydrocannabinol (THC) to cannabidiol (CBD); THC is the psychoactive ingredient, CBD cancels out the effects of THC. Cannabis sativa subsp. indica, its cousin strain, is used for medical and recreational uses (THC), is shorter and grows more broadly, and has a higher THC to CBD ratio. Strangely enough, the US Federal Government had not distinguished between these strains since World War II, although recently there have been actions by Congress to lower restrictions for Cannabis sativa subsp. sativa production, allowing some states to permit its cultivation.

Hemp has been used historically for making rope and paper. Hemp can also be used to produce food, fuel, and supplements (e.g. Omega-3 fatty acids). The U.S. imports hemp from Canada, and thanks to prohibition of all cannabis plants, Canada has not faced competition from the U.S. in hemp production. I'd say it is time to allow for permits in hemp agriculture - people are not going to get high off of hemp; the THC levels are far too low. But, what do you think? Do you disagree?