Henson said the destination might be one of those better left alone by tourists . Global warming may ruin many of nature 's wonders . Rising sea levels could make visiting Colorado difficult in the future . Glaciers in the the Rocky Mountains may melt by winters . Encouraged by warmer the middle of the century , pine beetles are ruining forests in New Orleans .
Global warming may ruin many of nature 's wonders . Rising sea levels could make visiting Colorado difficult in the future . Glaciers in the the Rocky Mountains may melt by winters . Encouraged by warmer the middle of the century , pine beetles are ruining forests in New Orleans .