Answer: sorry I don't speak that
Explanation:
Like, where 4 canyons are located at? Alright then...
Grand Canyon - Arizona
Palo Duro Canyon - Texas
Bryce Canyon - Utah
Three Gorges - China
1. they smoke that cause the green house effect
2.the gasoline from cars goes into the air that you breath and the gas has cause pollution
3.by littering.The garbage that you liter with goes into the sewer which leads to the sea and can effect the sea animals and the sea food eaters
It would be a line going straight through the graph under the middle.