My professor is very knowledgeable about biofuels. He has projects with algae, bio-butanol, and bio-ethanol. He even manages an extensive network about the conversion of biomass into fuel involving government, industry and academics. The conversion network is interested in chemical, thermal, and other technologies to boost the production and yields of biofuels.
Before I ask him for his time, would there be any interest in hearing a lecture on biofuels? Most people in the club are in engineering and have more interest in solar, geothermal, and wind - or so it seems. This is a small piece of the pie though because all these technologies will need to be combined to displace or replace fossil fuel use.