Biggest Threat !
Air Pollution & Poor Air Quality !!
Poor Visibility !
Due To Burning Fossil Fuels !!
Aircraft, Cars, Trucks, Trains, Buses & Other Fossil Fuel Users & Over 10,000 Coal Petroleum And Gas Fueled Electric Power Plants In The United States Affect The Grand Canyon
That's A Big No No !
Uranium Mining Also Affects The Grand Canyon !
Water in some streams have been tainted with fecal coliform from trespass cattle and from human waste
Humans should try not to traspass into the river to prevent human waste disposal
Avoid Transportation Near The Canyon To Prevent Pollution To The Air Which May Cause Respiratory Problems For Other Vistors
Try Not To Litter; Throw Trash Away In Trash Cans To Help Wildlife And The Environment From Devastion
Help Save The Grand Canyon !