A search engine that helps people cut their carbon footprint has been launched.

Click4carbon uses Google’s search technology, allowing people use all of Google’s features such as categorising searches by websites, images and videos.

Also an online community and forum, Click4carbon promotes environmental awareness and practical advice on how people can reduce their carbon footprint.

This includes a Carbon Calculator, designed to give users an idea of their impact on the environment after they've filled in information on their transport, recycling and home energy circumstances, that offers users a potential carbon savings target.

People can also compare their carbon footprint with their friends on social-networking sites such as Facebook and Myspace by using the site to click through to the application.

Click4carbon also uses the profits made by Google’s online advertising network to fund worldwide forestation projects managed by the Plant-a-tree-today Foundation.

This helps set up school tree nurseries and provide environmental education as well as fund community development projects.