New research into capturing carbon dioxide produced by coal-fired power stations and burying it beneath the Firth of Forth has received funding.
Scottish Power plans to capture CO2 emissions and bury them deep beneath the seabed in the estuary.
The Westminster government is supplying the bulk of the £2.3m funding for research into the plan.
Edinburgh University will search for the best sites, which will require specific rock formations.
They will be looking for porous rock into which the CO2 can be piped, covered by impermeable rock, to stop the gas escaping.
If successful they could help to create world leading techniques.
Environmentalists have given it a qualified welcome.
They are worried it could divert attention from developing greener energy sources.
A carbon capture scheme proposed for Peterhead power station in Aberdeenshire failed to get off the ground due to disputes over funding.
The proposal would have seen an industrial-scale hydrogen power scheme based in the town.
It would have converted natural gas to hydrogen and carbon dioxide gases, then used the hydrogen gas to fuel a power station. The carbon dioxide would then have been stored safely.