"I think fuel cells are a useful long-term goal," said Steven Nadel, executive director of the American Council for an Energy Efficient Economy, a research and advocacy group in Washington.
I think fuel safety probably needs to be looked at a bit more closely now this has happened.
Some vehicles using this technology will be built, but in the end I think fuel cells will fail because of costs and maintenance problems.
I was at the Michelin Challenge Bibendum alternative-fuel conference in Shanghai in 2004, and back then everyone thought fuel cells were going to be the thing.
I don't think fuel prices are going to shoot up.
A new climate model indicates that the West Antarctic ice sheet could melt faster than previously thought, fueling sea level rise.
I thought fossil fuels were more polluting than wood.
"Everybody thinks fuel cells are cool, but when they get into it they discover they know nothing about it".
"I think the fuel that fired my rockets was women's liberation," said Mr. Tuttle, owner of the San Francisco Tattoo Museum and perennial convention speaker.
I have worked out what I think that fuel load was based on the difference in pace between the Red Bull in pre-season testing last year and what it did at the first race.
