The problem with hemp on a national scale is the gargantuan amount of acreage that must be taken up to produce the oil and fiber. For example, let’s just consider hemp as a bio fuel to replace the current ethanol market (only ethanol not all petroleum fuel mind you)... First, you must start with seeds. Then from those seeds you grow the plant. From the plant you process it into oil and fiber, let’s just say for simplicity’s sake. Again, just looking at hemp as bio fuel, do you know how much acreage it would take just to replace the current United States ethanol fuel consumption with hemp biofuel/biodiesel fuel for diesel vehicles? Over 1.2BILLION acres. The entire US is only like 2.2bb acres. So over half of the United States’s entire landmass we need to be taken up just to grow enough hemp for fuel. Just mention the amount of factory space you would need to process the material into oil. The end product (hemp biofuel) is cheaper, cleaner, and less expensive when produced on a massive scale. But where are you going to get the material from? SOURCE: In order for hemp biodiesel to replace standard diesel, 50% of ALL land in the US would be needed to fulfill this order. https://medium.com/@taylorwoods_8780/hemp-mythbusters-can-hemp-biodiesel-replace-standard-diesel-76a3886b0269