Scientists need more entrepreneurial drive and could benefit by doing more to promote solutions to big human problems. Let's talk about solving some worldwide problems.

Let's get people really motivated. It is not hard to do this. You need to think that business and entrepreneurship is a good thing.

There are solutions to be found in the solar energy installations in the Nevada desert that are capable of producing 800 megawatts per square mile (2.5 square km).

A major limitation to wind power is the need for a distribution grid to move power from regions where wind blows to where populations are centered.

Eighty per cent of the electrical grid of Europe and North Africa could be served by an ambitious wind distribution grid cross-connecting the two regions. Are we going to build that grid? I don't think so. But it would be a good idea.

The reason why many scientific undertakings do not succeed are due to a lack of human effort rather than technical hurdles.