One way is to get taxpayers who never attend your church to pay for it:

Ever wondered how to start making your creaky, leaky, drafty church building more environmentally friendly?

Until May 31, Canadian Anglican congregations can apply for grants of up to $1,000 to subsidize a green building audit—a process that will help churches identify which areas of their buildings need to become more energy efficient.

Another, better way is to turn cow dung into electricity:

At the Huckabay Ridge biogas facility in Stephenville, Texas, a life preserver and a “No Swimming” sign hanging on the concrete exterior of one chocolate-colored pool are somebody’s idea of a barnyard joke. Early this year, the manure from 10,000 cows from Texas’ Erath County began stoking this facility, which is expected to produce enough pipeline-quality methane to power 11,000 homes.

Most Anglican Church of Canada parishes are such prodigious generators of BS, that they could be self-sustaining for centuries – long after the single remaining congregant has blown out his Earth Day candle, packed up his fair trade coffee and closed the draft proof door for the last time.