Now this is very interesting, if not particularly surprising. The US military has begun pushing for the development of renewable energy sources that can be readily deployed in battlefield situations and remote locations where traditional fossil fuels are prohibitively scarce. Trucking fuel to outposts and encampments in Afghanistan can be dangerous: "...for every 24 fuel convoys that set out, one soldier or civilian engaged in fuel transport was killed. " It is also extremely expensive. The US military buys fuel for around $1 a gallon, but shipping that fuel can easily cost hundreds of dollars per gallon. Taking those transport costs into account, the high initial costs of investing in renewable energy are put into perspective. The US navy has begun to experiment with ships that run on electricity at lower speeds, as well as jets that use mixtures of conventional and bio-fuels. It is likely the "experts" say, that development of these technologies for military use will lead to more affordable civilian versions.

"About 80% of the world's population lives in areas where the fresh water supply is not secure, according to a new global analysis." This article addresses a new study published in "Nature" that is looking at patterns of global water stress. It weighs the benefits of the western approach (damns, canals, etc...) against more integrated, "natural" approaches such as preserving wetlands and floodplains. The centerpiece of the study is a great example of GIS mapping on a global scale.