There are coins with much lower mining costs, like PPC coins. It uses a "proof of stake" algorithm instead of a "proof of work". I still haven't quite wrapped

There are coins with much lower mining costs, like PPC coins. It uses a "proof of stake" algorithm instead of a "proof of work". I still haven't quite wrapped my head around the math. Here is the paper: http://www.ppcoin.org/static/ppcoin-paper.pdf http://www.ppcoin.org/static/ppcoin-paper.pdf