It’s time to announce the winners of the annual Shell Eco-Marathon, in which students try to build incredibly efficient vehicles using gas, electricity, diesel, and hydrogen as fuels. You probably wouldn’t want to take a long trip in any of the winners, but the results are astounding.
Hydrogen cars aren’t taking off because hydrogen is hard to make and put in cars. But there is a lot of the gas in our waste treatment plants, and one in California will now let you fill up. Have they opened the door to a hydrogen economy?