Hemp power

A Mercedes car powered by hemp-seed oil has set off on a journey across
America to promote drug-law reform by showing how useful hemp plants are. Most
of America’s energy needs could be met if hemp were grown for fuel, say the
organisers. “Technologies such as pyrolysis would make hemp fuels economically
competitive with petrol fuels and would help remediate global warming,” says
Grayson Sigler, one of the project’s creators.