Sometimes an idea makes perfect sense with the information available at the time. In 1994, researchers published the results of an experiment in concrete-lined canals in California and Arizona. Lining the canals helped conserve water, but it also eliminated habitat used by fish and other aquatic organisms. Their solution was innovative: build artificial habitat from
Heavy metal poisoning is a growing concern in many parts of the country. A new method for removing chromium-6, a highly toxic heavy metal, from waste water has been developed by a group of scientists from India and Ethiopia. They claim it to be low-cost and safe. The new method uses water hyacinth, a weed