 There's a clear need to develop new processes for the production of renewable fuels and chemicals. We could spend a long time talking about some of the drivers. Oil prices are increasing. When I started doing this research in 2000, oil prices were $20 a barrel and now oils over $88 per barrel. And going up, there's environmental concerns. We're continuing to release more and more CO2. I don't think anybody has a real serious way to address this challenge. The CO2 level is increasing. There's concerns about national security. There's legislation like the U.S. Renewable Fuel Standards. This requires us to produce 22 more billion gallons of renewable fuels per year by 2022. So in eight more years, we have to increase the amount of renewable fuels by 22 billion gallons, which I don't even know if we'll be able to hit. There's a number of sustainable resources. These resources are both cheap and abundant. There's several challenges with these resources. But really the real challenge is that we don't have technology to take these renewable resources, convert them into liquid fuels that fit in the current infrastructure. And the challenge really is the high cost of these conversion technologies. And that's really the focus of our research group, really, is to develop economically viable technologies. Different options to make renewable liquid transportation fuels and chemicals from biomass and other renewable resources. There's several renewable resources we look at. Lignocellulosic biomass, carbohydrate-based biomass, solar energy, carbon dioxide. There's renewable electricity options that are coming online where you can store the electricity as chemical energy. Now there's several challenges with working with renewable energy feedstocks. The first is economics. Your energy is always a commodity. It's the largest commodity on the planet. There are all very capital-intensive processes to build. For example, to build a biorefinery would cost anywhere. The first biorefinery is going to cost anywhere from $300 to $600 million, so very expensive to overcome that initial hurdle. Your renewable feedstocks usually have a very low energy density. In comparison, we're usually converting coal, natural gas, liquid fuels that have a lot higher energy density. These are traditionally distributed resources. The biomass, different locations, the solar energy as well, distributed resources. And also, these are not a continual source of these resources. These are seasonal, these change with time, also the season as well. So these are the challenges we're working to overcome to try and develop new technology options.