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A nuclear electromagnetic pulse ( nuclear EMP or NEMP) is a burst of electromagnetic radiation created by a nuclear explosion. The resulting rapidly varying electric and magnetic fields may couple with electrical and electronic systems to produce damaging current and voltage surges. The specific characteristics of a particular nuclear EMP event ...
A high-altitude electromagnetic pulse (HEMP) weapon is a NEMP warhead designed to be detonated far above the Earth's surface. The explosion releases a blast of gamma rays into the mid- stratosphere , which ionizes as a secondary effect and the resultant energetic free electrons interact with the Earth's magnetic field to produce a much stronger ...
Hemp in the United States. Hemp in the United States is a legal crop. It was legal in the 18th and 19th centuries, then production was effectively banned in the mid-20th century, and it returned as a legal crop in the 21st century. By 2019, the United States had become the world's third largest producer of hemp, behind China and Canada.
Workers set hemp clones at a farm in Owen County, Ky., on Thursday, June 22, 2023. Fiber, seeds and oil from hemp have application in a wide range of goods, from flooring and automotive parts to ...
Hempcrete is a construction building material that uses hemp shives, aggregate, water, and a type of binder to act as non-bearing walls, insulators, finishing plasters, and blocks. The material has low mechanical properties and low thermal conductivity, making it ideal for insulation material.
Cannabis cultivation dates back at least 3000 years in Taiwan. [3] The history of cannabis and its usage by humans dates back to at least the third millennium BC in written history, and possibly as far back as the Pre-Pottery Neolithic B (8800–6500 BCE) based on archaeological evidence. For millennia, the plant has been valued for its use for ...
Hemp, or industrial hemp, is a plant in the botanical class of Cannabis sativa cultivars grown specifically for industrial and consumable use. It can be used to make a wide range of products. [ 1] Along with bamboo, hemp is among the fastest growing plants [ 2] on Earth.
Jack Herer in Washington, DC, in 1989. Jack Herer and Dana Beal at the September 1989 Great Midwest Marijuana Harvest Fest in Madison, Wisconsin. Jack Herer ( / ˈhɛrər /; June 18, 1939 – April 15, 2010), sometimes called the "Emperor of Hemp", was an American cannabis rights activist and the author of the 1985 book The Emperor Wears No ...
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