Cities offer us powerful leverage on our most stubborn, wasteful practices. Long commutes in our cars, big power bills from our energy-hogging buildings, shopping trips to buy stuff that'll spend a few short months in our homes and long centuries in our landfills.
I soon realised that what had happened on a small scale cannot necessarily be repeated on a larger scale. The stones were so big that the amount of heat required was prohibitively expensive and wasteful.
Make no mistake: I will work with both Democrats and Republicans to cut wasteful spending and reduce our debt in a balanced, responsible way.
Every effort needs to be made to try and offset the costs of Katrina and Rita by reductions in other government programs, especially those that are wasteful, duplicative and ineffective.
The goal of the program, called Giving With Purpose, is to teach college students - and anyone else who cares to register - how to beneficially contribute to charity. That's not necessarily easy. There are IRS rules for giving that must be learned, and there is wayward, wasteful philanthropy to be avoided.
Now, so, if you want to blame someone for wasteful spending, the Republicans are in the majority.
Bitcoin solved the double-spend problem. The key problem was payment confirmation without central clearing. Bitcoin's solution was ingenious but wasteful - it's fairly slow, and you can't put other things on it.