Water authorities in Denver, for example, saw their filtration costs soar as forest fires in the surrounding watershed turned their clean water to goo.

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They started a product that was a small water filtration -- portable water filtration system, and the Marines have just bought that for our troops in Afghanistan.

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The group has installed water filtration systems, built ramps for the disabled, improved care for the elderly and raised awareness about local health issues.

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Businesses are developing products such as advanced filtration systems for sale in countries where water isn't just scarce, but also polluted.

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Other resource-efficient projects like New York's 4 Times Square office building, Atlanta's EarthCraft House and Village Habitat Design's cohousing conservation communities include such innovations as energy-efficient insulation, water and air filtration, or hydronic heating, aiming for healthy, nontoxic construction processes and buildings for humans and the environment.

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The Global Water Experiment was developed by IUPAC and UNESCO, it includes a set of experiments (acidity, salinity, filtration, distillation) for pupils of different ages to analyze the quality of water and learn how to treat their local water sources.

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