Energy, CO2, and Global Change: Technology for a Greenhouse World

Humans are a significant geochemical force on planet Earth. Concentrations of greenhouse gases have risen significantly since the beginning of the industrial revolution, and effects on climate and the oceans are now being observed. Observed changes over the last century and plausible future projections of energy use both argue for significant changes in the way we transform and use energy. Improved energy efficiency will be an important component of reductions in greenhouse gas emissions, but growth in energy use in developing economies (like China and India) will mean that significant changes in the world's energy systems will be needed. This talk will review the reasons for changing the world's energy systems and then consider the range of technology options that might allow significant reductions in greenhouse gas emissions. Examples of research that might allow new energy options will be discussed.