Interesting article about how they are turning food waste into methane and how the methane is being used to create electricity.
You can also do this at home with digesters you can buy on eBay and Amazon. Just do a search for "digesters" on those sites.
Now worm farms will have to compete with power companies for food and manure scraps. That is a great position to be in because we generate too much waste that could be put to good use.
Here is the article.