Further loss of Arctic ice will see radiation absorbed by darker seawater and snow-free land, potentially warming the Earth's climate at an even faster rate than current observational data indicates.

BBC: Canadian Arctic sheds ice chunk

It is therefore likely that the addition of sulphate to the stratosphere would result in a loss of ozone, and thus in more ultraviolet radiation getting through.

ECONOMIST: Geoengineering

That could have led to a loss of water and eventually to the exposure of the spent fuel rods to air, releasing radiation.

BBC: Power at Fukushima nuclear fuel ponds restored