Which of the following BEST describes the effect that the number of remaining trees and the concentration of VOCs have on the chance of the formation of photochemical smog?
1) There is a higher chance of the formation of photochemical smog as the concentration of VOCs increases and as the number of trees remaining decreases.
2) The chance of the formation of photochemical smog reduces as the concentration of VOCs increases and as the number of trees remaining decreases.
3) The formation of photochemical smog does not occur as a result of VOCs emitted by trees.
4) The chance of the formation of photochemical smog cannot be determined by the provided data.