Composting produces heat so it's a good idea to use it ..
here are some examples
... & mushrooms :)
Brian Kerkvliet from Inspiration Farm tells us about his little compost pile that provided 500 hot showers. Compost heat can, indeed, be captured to heat water. After the hot showers, you have a lovely pile of compost! The moisture from the shower feeds mushrooms! Hot water, compost and mushrooms. Permaculture!
http://www.permacultureplanet.com
A short demonstration on how to build a compost powered hot shower. For more information please visit;http://www.permaculture.biz
This is a huge pile of free mulch for composting that the tree cutters give way for free! It is excellent fill, breaks down rapidly and produces beautiful rich soil. One pile releases several thousand BTU's of heat over the decomposition process.