The economist gives a good article on alternative engines and focuses on steam. It is a bit satirical but the solution to environmental degradation (in the popular media it is a.k.a. "Climate Change") needs to be as broad as possible.
The price of oil needs to be high to create large investments in alternative energies and a "sustainable" economy. But, the price of oil is low. This article shows what happens to investment in a sustainable economy when the USA goes into a depression and the price of oil is low.
The economist supplies another great article on computers and how green this whole technology thing is . The article gives some good information on how sustainable the carbon emissions of the computer world are. Currently, Computing and Telecommunications produce 2% of global emissions which is comparable to the amount that aviation emits (plane travel). The article did not specify what was being emitted by technology use, but apparently it is 2% of global emissions of all things. Pollution is not a single thing, some pollution is preferable to other pollution. So, 2% of global emissions does not mean much. But, the article is worth reading, and so is most of the economist.
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