Want to take a trip that won’t cost a thing? If so, then go to Tox Town where you can visit the US-Mexico Border as well as a city, town, and farm all on one website.
Tox Town http://www.toxtown.nlm.nih.gov/town/main.html is a web-based introduction to environmental health risks and toxic chemicals. The target audience is students above elementary-school level, educators, and the general public. This is a project of the Specialized Information Services Division of the National Library of Medicine, National Institute of Health.

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