Medical research should include PhDs in the specific discipline being studied. Look for names like Nature, Science, The Journal of the American Medical Association or The Lancet . Studies of small samples are of dubious value. Try to make sure that bias is reduced through the use of properly matched test and control groups. Check the reports for sections discussing methodology and any potential problems relating to it.
Good studies go to great lengths to minimize the potential for error.
They also go to great lengths to explain both what bias or errors may still exist. Don't draw conclusions from single studies or ones that contradict the preponderance of available evidence. We're happy about the news coming out of Detroit and other automotive hubs. There are lots of new developments to watch, many of which could truly reduce waste, pollution and energy consumption. Wind, which is a renewable resource.