The Navajo — at almost 300,000, the largest tribal population — have ruled out all participation in genetic studies. (discovermagazine.com)
These program dollars help fund services linking tribal populations to jobs, healthcare and other services, often in rural areas where transit is sparse or nonexistent. (transportation.gov)
Despite Brazilian officials who say they are working to protect the groups and have seen tribal populations on the increase, threat from encroaching loggers becomes graver with every passing day. (treehugger.com)