1. What are some of the reasons that wind-energy capacity is growing at 30-40% per year in Europe? At this rate, how long would it take to double this capacity?
2. Hydrogen fusion converts about 3% of its mass to energy(E=mc^2)when 4 kg of Hydrogen is fused into Helium. Given that water is 1/9 hydrogen by mass, how much water per person would be needed to supply this power assuming that, on average a person in the US uses 82,000 kWh per year?