The EPA and National Park Service found harmful nitrogen pollution was 38 percent higher than the 2017 target level.
Rocky Mountain National Park (RMNP)
Visitors left behind human waste and trash, graffiti'd a Joshua tree and created unauthorized trails with off-road vehicles.
Rocky Mountain National Park ranger Jean Muenchrath chronicled her ordeal and recovery in a memoir, “If I Live Until Morning."
The president’s closed door meeting with congressional leaders produced no results, so the stalemate will continue.
The ongoing partial shutdown of the federal government has affected National Parks and federal lands across the country in different ways.
Roads that were passable at the time of the shutdown would remain open unless conditions worsened, park spokeswoman Kyle Patterson said.
The search for Ryan Albert started in early October, but winter weather conditions hampered efforts.
Sen. Michael Bennet has cosponsored, and Sen. Cory Gardner supports, a bill that could raise $6.5 billion for parks maintenance.
Campfires are now only allowed in designated campfire rings in picnic areas and established campgrounds. Charcoal grills, wood fuel camp stoves and gas grills can also be used.
Study co-author Ivan Rudik said air quality warnings issued by parks and other government agencies may be causing the visitation drop.