This story was originally published by HuffPost and is reproduced here as part of the Climate Desk collaboration. Dawn Goodwin spent her 50th birthday among towering pines and yellow birches whose tree rings make her lifespan seem like a child’s in comparison. But on that cool, overcast Saturday in December, the growling of construction trucks and chainsaws drowned out the natural soundscape of gushing freshwater and wind whispering between pine needles on the banks of the Mississippi River. Goodwin was at this river crossing near Palisade, Minnesota, to protest the construction of the energy company Enbridge’s Line 3 pipeline, a $9.3 billion project to carry tar-sands oil—one of the dirtiest varieties of crude oil—from Joliette, North Dakota, to a terminal facility in Clearbrook, Minnesota.