Geoengineering won't save our glaciers.
Here's why.

As the cryosphere continues to deteriorate a growing chorus of voices is turning to geoengineering as a solution. Researchers have floated everything from giant underwater curtains to block warm water from reaching glaciers, to drilling holes to drain water from beneath ice sheets, to spraying reflective aerosols into the stratosphere.

A major new assessment examined five of the leading ideas for their effectiveness, feasibility, risks, costs, and governance. But they concluded that none passed scrutiny and all would be environmentally dangerous.