COS Earth Transformed logoMost of the talk about man-made global warming centers on reducing carbon dioxide emissions, but there’s doubt that emission reduction can cut CO2 levels fast enough to avoid catastrophic results by the year 2050.

To be safe, scientists and engineers are working on ways to capture—or “sequester”—emissions as a complement to efforts at curtailing emissions altogether. The International Energy Association warns that at least 1/6th of CO2 future emissions must be captured and stored by 2050 to limit rises in average global temperature.

At 3:30 p.m. Thursday (April 14), the Arizona Senior Academy will present a pre-recorded encore lecture by Kimberly Ogden, a professor of Chemical and Environmental Engineering in the University of Arizona’s College of Engineering. Ogden will outline many of the current methods being considered for capturing carbon and the primary barriers to their widespread use: testing them at a large scale, building an infrastructure to support them, and cost.

Kimberly Ogden
Kimberly Ogden

Ogden’s lecture is the fourth of four presentations from this year’s UA College of Science series, “Earth Transformed,” originally given at Centennial Hall in downtown Tucson. The ASA’s annual encore series offers east side residents a chance to see and hear these thought-provoking lectures while avoiding a trip downtown.

Ogden’s presentation is entitled “Carbon Sequestration: Can We Afford It?” She will devote much of her talk to the potential of microalgae—single-celled nonplant organisms common in freshwater and marine environments—for reducing atmospheric carbon dioxide and producing fuels that are cleaner than fossil fuels, particularly coal, oil and natural gas.

She’s involved in a global effort to learn more about microalgae and develop it as a technology for carbon sequestration.

Written by Mike Maharry, Academy Village Volunteer


Can Tiny Algae Help Stop Global Warming? April2016