Cannabis plants could be the missing player in human's fight against climate change, as hemp can absorb carbon dioxide from the air more than twice as effectively as trees. Numerous studies have shown that hemp captures up to 16 tons of greenhouse gas annually, while trees suck up about six tons. The carbon dioxide also becomes permanently encased within hemp fibers that are used in a range of products - from textiles to medicines and car parts. Hudson Carbon, a New York research center that studies carbon storage, found that one acre of cannabis plants can store up to three...