Spreadsheets are fiction. Believing in what you're doing and what you're building is what's important.

The U.S. has fallen well behind Europe in recognizing climate change and the implications of climate change.

Electric cars are coal-powered cars. Their carbon emissions can be worse than gasoline-powered cars.

Your cellphone has 10 sensors, and your car has 400. But your body has none - that's going to change.

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.

Certain food-based biofuels like biodiesel have always been a bad idea. Others like corn ethanol have served a useful purpose and essentially are obsoleting themselves.

Letting the perfect be the enemy of the good is one of the reasons we have a coal-dependent infrastructure, with the resulting environmental impact that all of us can see. I suspect environmentalists, through their opposition of nuclear power, have caused more coal plants to be built than anybody. And those coal plants have emitted more radioactive material from the coal than any nuclear accident would have.