Wow seVen, can there actually be something we agree on?!
Hemp is one of the first cultivated crops by humans. It has so many purposes. It’s a shame that it is banned under the umbrella of marijuana.
Actual hemp has 0.00–1% THC (commonly 0.3%). You cannot get high by smoking it, you’d damage your lungs before getting anywhere near high. That’s not why they banned it, they banned it because it was a competitor to cotton, paper, and many other new industries around 1915–1925; and they were able to capture the paranoia they created about marijuana and apply it to hemp as well.
The reason it’s not used is the same reason why marijuana is still illegal – the government can never admit it was wrong, and it leaves them in a sticky situation regarding what to do with people currently in the judicial system being penalized for crimes that are now legal.
That said, as with most of seVen’s questions, this is a hyperbole at best, and blind dreams at worst. Hemp will not save our problems. The first step in “saving the Earth” is simply realizing that the lifestyle we lead in the past is not the lifestyle we should live in the future.