Late last year, I and three others (two of whom I work with from time to time on various environment related projects) on Sunday Nights with John Cleary on a program entitled The Evangelical Environment. There is a podcast available.
I'll let readers decide how useful it was, but the program was motivated by exit polls from the US presidential elections and the low priority given to environmental issues by Evangelicals in those polls. One of the participants was from the Australian Christian Lobby (ACL), which I think it would be fair to say don't usually focus on such issues because they fear the Greens and some of their policies. Much of our time was spent on this. A lot of the time was spent on discussing climate change - but of course the problems are broader than this. Enjoy.