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Known effects of ultraviolet exposure include greater incidence of skin cancer and eye cataracts among humans and diminished crop yields for foods such as peas , beans , squash and soybeans . Clad in leather garments - - augmented by furs during the winter - - these native people skillfully cultivated corn , beans , squashes and pumpkins ; hunted the woods for deer , elk and bear ; and fished for salmon and herring . But they did grow corn , beans , squash and other crops . They still hunted and gathered , not as their only avenues for acquiring food , but as a complement to cultivated corn , beans , squash and other crops . They cultivated many plant types including maize , beans , squash and other formerly wild species such as Chenopodium album ( commonly called Lamb 's Quarters , White Goosefoot , or Pigweed ) .