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Science and Innovation

  • A Hopi man in a blue sweater stands in a yard scattered with logs and stumps.
    Melissa Sevigny
    /
    KNAU
    This is the fourth winter since the Kayenta Coal Mine closed and left Hopi residents without a reliable source of heat for their homes. Many tribal members have switched from coal to wood to keep warm, but the transition hasn’t been easy. KNAU’s Melissa Sevigny reports, nonprofits have stepped up to help.
  • cows.jpg
    Melissa Sevigny
    /
    A new paper looks at the environmental effects of grazing livestock in arid regions in 25 countries throughout the world. The results show it’s possible to improve ecosystems with grazing—but it’s more likely to cause harm in hot, dry regions like the American Southwest. KNAU’s Melissa Sevigny spoke with soil ecologist Matthew Bowker of Northern Arizona University about the findings.