People living in a Brecon Beacons village are being urged to take part in a survey which aims to make their community carbon neutral.
The community already has a hydro-electric scheme
Residents and business owners in Talybont-on-Usk near Brecon are being asked to provide information about how much energy they use.
Volunteer surveyors plan to measure the amount of carbon dioxide produced.
Talybont-on-Usk Energy, a company promoting renewable sources of power in the village, is behind the idea.
In 2006, the not-for-profit firm helped set up a community hydro-electric scheme to supply the national grid with power.
Now it is aiming to make the village carbon neutral.
In order to achieve this it will have to save the same amount of carbon emissions as it produces.
The saving can be made by using green or renewable energy sources, becoming more energy efficient and by planting trees.
Alice Goldstone, who co-ordinates the project for Talybont-on-Usk Energy, said: "This project is an important early stage in helping to make the community carbon neutral.
"A group of volunteer carbon footprint surveyors, who live in the area, have already been trained and more training for more volunteers will take place later in January.
"To make those being surveyed feel more comfortable with the process all the volunteer surveyors are from the local area.
"Community carbon foot printing is not about judging how much energy an individual is using.
"We simply want to find out what the carbon footprint of the entire community is so that Talybont-on-Usk Energy is in a better position to continue to help make the community carbon neutral," she added.