| http://www.w3.org/ns/prov#value | - According to Schroeder, issues such as global warming and greenhouse gases, health-care reform, preserving fishing banks in the Atlantic and salmon runs in the Northwest, to saving endangered species and finding alternative energy sources are not only some of the problems and challenges of the 21st Century, but also problems and challenges of the 20th Century that were not taken care of them.
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