original_query: What is solar geoengineering or solar radiation modification (SRM)?
query: What is solar geoengineering or solar radiation modification (SRM)?
answer: Solar geoengineering, or solar radiation modification (SRM), is a proposed type of climate engineering to reflect sunlight back to space and limit or reverse human-caused climate change.  It's considered a potential emergency measure to limit overheating, not a replacement for reducing greenhouse gas emissions.