Haven’t all those passing through also left tons of trash behind. Tons of trash that animals find and eat such as plastic bottles, baby drappers, empty cans, plastic rings that held 6 cans together.They liter the land,trashing it for milies.Washington feels border angents entering federal lands causes more damage to the environment than does, drug cartels, who make camps and cook using products to make coke,dumping all their trash on land,lakes,streams , etc,etc ?