This is the fourth presentation in our Science Literacy series at MIT. Prof. Cziczo provides an overview of the climate change issue and then a critique of geoengineering. He explains the options, and --more importantly—the misinformation that seems to accompany the solar radiation management option in particular. He lists the kinds of questions the public needs to ask in the effort to determine a policy for reducing the CO2 in the atmosphere that is rapidly warning the planet.