Lanarkshire, Renfrewshire and Dunbartonshire are the most environmentally committed areas in Scotland, according to green campaigners.

Lanarkshire, Renfrewshire and Dunbartonshire are the most environmentally committed areas in Scotland, according to green campaigners.

The Energy Savings Trust's two-year campaign to reduce carbon emissions across the UK by 20% has also found the combined efforts of the residents of Peeblesshire, Selkirkshire and Moray would barely cover the annual domestic fuel bill of just one home.

The findings come as Scotland's largest local authority unveils its blueprint to cut carbon emissions by one-fifth, or 40,000 tonnes, within the next five years.

Glasgow City Council, which according to the Energy Savings Trust has helped reduce household emissions by 30% in the past decade, will unveil a raft of more than 30 separate projects from the use of low-emitting vehicles and better route planning through to the use of swimming pool covers and tighter controls over urinals in municipal buildings.

Glasgow has taken some criticism of late for its environmental efforts, including accusations over its recycling record and promotion of the M74 extension.

But council leader Steven Purcell insisted the authority was doing more than most.

He said: "We're not interested in playing gesture politics with climate change and the other environmental challenges we face. It's real, deliverable improvement that counts."

According to the Energy Savings Trust, 21,241 Scots committed to its Save Your 20% campaign, which ends in April.

Of the commitments, 75% were promises to change daily energy saving habits such as switching to energy saving recommended lightbulbs, boiling only the water required in the kettle, turning the room thermostat down 1C, and washing laundry at 30C, while 25% were pledges to undertake energy- saving home improvements including installing a condensing boiler or loft or cavity wall insulation.

It claims that if everyone who committed in Scotland honours their promises, collectively they will save around £550,000 a year, enough CO2 to fill 22,000 double-decker buses.

Lanarkshire, Renfrewshire and Dunbartonshire showed the highest levels of commitment and could collectively save £447,000 a year off Scotland's annual domestic fuel bill or enough to pay the annual energy bills of 492 homes.

Last night Green politicians gave Glasgow's efforts top reduce carbon emissions a guarded welcome.

Green Party councillor Martha Wardrop added: "It is evident from Glasgow ranking 15th in the UK Sustainable Cities Index from 2007 that this strategy is needed and vital for any improvement to performance in sustainability."