We classify companies in our energy portfolio as those that seek to
improve performance, productivity or efficiency, and to reduce
environmental impact, waste, cost, energy consumption or raw materials
using nanotechnology-enabled solutions. Energy is a term used commonly to
describe products and processes that solve global problems related to
resource constraints. The term, "Cleantech," is also used commonly in a
similar manner. We believe macroeconomic and microeconomic trends,
including ongoing growth in consumption of energy and resources, energy
security concerns and volatility of commodity prices, create attractive
investment opportunities in energy.