My Recommendation is:
My recommendation is to switch to alternative fuel.
Stop using gas and oil and use alternative fuel. 
We should start using solar, wind generators, propane, because they make less air pollution. 
 
 

Positive Consequences:
The positive consequences are less pollution.
Not much haze in the Grand Canyon.

Negative Consequences:
The negative consequences are the prices will be expensive.
People will have to pay a lot for the alternative fuel.
 
 
 
 
 
 
 
 

My recommendation is:
My recommendation is to park all the vehicle 10 miles away from the Grand Canyon.
Then the transportation to be used from that point will be electric vehicles.

Positive consequences
It will be less hazy in Grand Canyon
The environment will be cleaner
The tourist can see the canyons better

Negative consequences 
It’s not going to be convenient for tourist because the electric vehicles may not have the same power as a vehicle that uses gas.
Cost.