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  1. Earth

    Seismic shivers tell of tornado touchdown

    Researchers say they can now use earthquake-detecting seismometers to detect and possibly track all but the weakest tornadoes.

    By Linda Wang
  2. Earth

    Electricity-leaking office equipment

    Nearly 2 percent of U.S. electricity each year goes to power office equipment that had ostensibly been turned off.

    By Janet Raloff
  3. Earth

    Contaminants still lace some meats

    Tainted ingredients of livestock feed can contribute to worrisome residues of organochlorines, such as PCBs, ending up in meat.

    By Janet Raloff
  4. Earth

    Plastic debris picks up ocean toxics

    Some plastics can accumulate toxic pollutants from water, increasing the risk that they might poison wildlife mistaking these plastics for food.