We have some tough decisions to make about energy supply and about energy demand. And every analysis of these decisions that I have seen indicates that the most cost effective thing we can do is to improve energy efficiency. This applies across the board -- transport, heating/cooling, electricity use. It...

Part of the debate over how to best tackle climate change in the US, EU and other developed countries is around the question of tax or trade. Do we up the tax on gasoline, or for that matter on electricity or heating oil, do we put big taxes on refineries...

We started out as human beings with the need to tame solar energy to get our food. Sunlight is distributed over the entire planet, maybe not quite evenly but there is sufficient sunlight most everywhere to sustain us, and we had to develop systems and societal rules to use it...

In case anyone asked you, would you say, 'yes, build some nuclear plants to get us our electricity', or would you say, 'no way, I don't want it, I'll take as much wind and solar and geothermal and anything else, I'll even put up with the problems of coal, I'll...

Over 52 tons of solid waste is landfilled per second on planet earth. This translates into 2.6 billion tons of landfilled waste per year, and over 3 billion tons of CO2 equivalent greenhouse gas emissions per year from landfilled waste. So shall we put this in perspective, this number of...

This is an historic moment for the world auto industry. On the morning of June 1st 2009, General Motors, once the world's largest company, filed for bankruptcy. This follows the recent bankruptcy of Chrysler. Events which were once unthinkable have come to pass.
When cars were first invented...

Since human beings have inhabited this planet, say for the last 40,000 years or so, we have been sent problems to solve. Pretty difficult problems too. I don't mean the mundane problems of existence, how to start a fire, catch animals, grow plants, figure out what stuff is poisonous and...