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We must continue research into new forms of energy and into more efficient use of existing energy sources.

The question of energy is an important one. The big issue is how to get it, how not to destroy the environment, and how to survive as a species. It's a big deal.

IT is now reaching out to fuels and chemicals, energy and clean tech, rockets, all kinds of bizarre industries that formerly didn't face much competition.

We've gone from thinking the fuels that powered our growth were inexpensive, inexhaustible and benign to understanding they are exhaustible, expensive and toxic. Once you frame the problem that way, people will look at solutions differently.

Is the minor convenience of allowing the present generation the luxury of doubling its energy consumption every 10 years worth the major hazard of exposing the next 20,000 generations to this lethal waste?

Our technological powers increase, but the side effects and potential hazards also escalate.

The demand for electricity to have a strong, growing economy is too great to be simply offset by more conservation.

We ought to open up energy innovation across the board and - and remove the barriers to every form of energy.

I think future engineered species could be the source of food, hopefully a source of energy, environmental remediation and perhaps replacing the petrochemical industry.

I believe that it is impossible to stop people from using the fossil fuels, so we need to develop technologies which allow us to use them without creating environmental havoc on the planet.