Removing dead trees. A group of workmen are cutting down trees that have been killed by mountain pine beetles (Dendroctonus ponderosae). Infestations of mountain pine beetles are common in the US,where they have killed millions of hectares of trees in the west. Scientists expect the problem to worsen with global warming,as very cold weather is needed to kill the beetles. Photographed in Grand Lake,Colorado,USA | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / West, Jim |
Bildgröße: | 3417 px × 5125 px |
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