Climate Central: Fifty years ago, the idea of reducing the amount of sunlight reaching the earth to address climate change officially entered the scientific and political vernacular. That concept has since been lumped under the banner of geoengineering with other hotly debated techniques that could help cool the planet.
Just five years ago, President Obama's science advisor said that geoengineering has "got to be looked at.' On Tuesday, a report funded by federal agencies and released by the non-profit National...