18 December 2014 Last updated at 19:26 ET
By Rebecca Morelle Science Correspondent, BBC News
Getting ships to generate smaller bubbles as they sail across the oceans could counteract the impact of climate change, a study suggests.
Scientists from University of Leeds, UK, say this would create a brighter wake behind a vessel and reflect more sunlight back into space.
However, it could also increase rainfall in some areas.
The findings were presented at the American Geophysical Union Fall Meeting in San Francisco.
This is the latest idea from the hotly debated field of geoengineering – manmade global fixes to climate change.
Suggestions for reducing the amount of solar radiation absorbed by the Earth range from installing giant mirrors in space to injecting salt into clouds to make them more reflective.
But Leeds’ Prof Piers Forster said the bubbles idea was a more plausible scheme.
He told BBC News: “A lot of these technologies are completely hypothetical.