Will biofuel usage require land? Absolutely, but we think the ability to use winter cover crops, degraded land, as well as using sources such as organic waste, sewage, and forest waste means that actual land usage will be limited. Just these sources can replace most of our imported oil by 2030 without touching new land.

The world is hung up on food-based biofuels. Not only are they the wrong thing, they're the uneconomic thing.

Setting an aggressive enough carbon-reduction goal will result in an appropriate price for carbon and will help many a renewable technology. Consumer education will help. Most importantly, though, will be the continually declining cost trajectory of the real breakthrough in clean-technology costs driven by research and innovation. In the end, private capital is the real barometer of change.

Seeking an acquisition from the start is more than just bad advice for an entrepreneur. For the entrepreneur it leads to short term tactical decisions rather than company-building decisions and in my view often reduces the probability of success.

Every big problem is a big opportunity.

Imagine the world of mobile based on Nokia and Motorola if Apple had not been restarted by a missionary entrepreneur named Steve Jobs who cared more for his vision than being tactical and financial.

I generally disagree with most of the very high margin opportunities. Why? Because it's a business strategy tradeoff: the lower the margin you take, the faster you grow.