From somebody I used to work with, who says it's from somebody he works with...:
"Remember when I stated that all this Global Warming crap was an attempt to scare people into buying stuff that was labeled "environmentally safe" by the big money companies. The scientists scaring us are funded by said companies. In my searching I found a few thiings;
For one thing, I found that Popular Mechanics, in February 1937, predicted hemp would be the worlds first Billion Dollar Crop that would support thousands of jobs and provide a vast array of consumer products from dynamite to plastics.
[This impending reduction in the cost of hemp products posed a threat to the profits of DuPont. As a result, in the Hearst newspapers and elsewhere, a strident propaganda campaign against hemp developed, playing on various alleged threats posed by the psychoactive part of the plant. The end result was the passage of the Marijuana Tax Act of 1937, which was then used as justification to impose a ban on all hemp.]
excerpt from "Feasibility of Industrial Hemp Production in the United States Pacific Northwest, by Daryl Ehrensing, Department of Crop and Soil Science, Oregon State University"
Also I couldnt help but notice the amazing coincidence that the American patent on the production of Freon, the principle chlorofluorocarbon used in refrigerators and air conditioners, expired at just about the same time Freon was banned. Those countries that had begun producing Freon without paying for the privilege were asked to stop. And a new chemical compound, a commercial product that would be protected by patent, would soon be substituted and make a lot of money for the company that produced it.
Again, DuPont seemed to be behind this. Then came the propaganda that freon was bad for the environment."