I have recently become interested in the issue of Peak Oil and have found PCI to be a dependable source of accurate and up-to-date information.
PCI is one of the best non profits I have ever encountered. They spread the truth no matter wht they cost. They are tireless in educating and informing. Given the reality of our environemnt, it would be easy for them to put forth a doom and gloom message - and they put forth the facts to be examined. GO PCI!
I've worked with and volunteered for a number of nonprofit/NGOs over the years, and never have I found a higher level of commitment or dedication to spreading the truth - regardless of how unpalatable some of these tough truths are - then Post Carbon Institute. PCI doesn't have the budget or the reach a big NGO like the Sierra Club, but their research and positions also don't suffer from the influence of political muscle. Three cheers for PCI.