BT has launched its Net Good programme, which is designed to help customers significantly lower their carbon footprint by the end of the decade.
The firm wants to see broadband subscribers and other customers reduce emissions by at least three times the end-to-end carbon impact of its own business.
BT's 3:1 goal is based on the premise that it is directly responsible for emissions resulting from its own operations, but also those generated in its supply chain and when customers use its products and services.
Ian Livingston, Chief Executive at BT, said that as proud as the firm is of its own record, "doing less environmental damage is no longer enough".
"We are moving beyond simply making our own business more resource-efficient to using products and services to help our customers do the same," he stated.
"Communication technology has a significant role in helping create a better future by enabling businesses and individuals to use resources efficiently."
Tom Delay, Chief Executive of The Carbon Trust, said BT is taking a "pioneering approach" in setting an ambitious goal for emissions reduction.
He claimed the 3:1 goal builds on BT's 20-year history of measuring its carbon impact and "putting sustainability at the core of its business strategy".
"Making the framework widely available to the business community further demonstrates BT’s commitment to making this approach work," Mr Delay stated.