PETER MENZEL / SCIENCE PHOTO LIBRARY PETER MENZEL / SCIENCE PHOTO LIBRARY
Herbicide face mask. Man in a face mask worn during the spraying of herbicide or weedkiller on weed grass. The grass is African kikuyu, a very hardy alien species. Plant weeds, like alien animals, may outcompete native species and destroy the native ecology. Photographed in the rainforest of Volcanoes National Park, Big Island, Hawaii.
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