Planes and ships could run on kelp someday, but there are serious hurdles

WOODS HOLE, Mass. (AP) — Green cells whirl around a red-light chamber, propelled by a blade through bubbling water. These little seaweed cells, called gametophytes, will develop into a strain of fast-growing kelp — part of what was once a government-funded initiative to develop sustainable biofuels for American transport. Electricity from solar and wind energy [...]