During what time of day does air travel have best damaging effect on the environment?

a. daytime
b. night time
c. it makes no difference

c!
c?

i wanna know the answer.

anytime and day

day time

The answer is obvious for any scientist, but I have now realized that you are only looking for simple answers, and let others do your work for you!

Open your textbook, and answer whatever they believe is correct, or actually try to understand.

Please do not try to use YA as an easy way of having others do your work for you.

Get off the computer, and stick your head into your homework!

Heavier gases cool and sink, at least in the lower troposphere. I would guess night time or peak transition phase hours.

2:00 pm and 2:08pm

Air travel does not damage the environment. For the amount of weight that can be moved over long distances, it's the cleanest way to travel.

Easy Rider is right.. don't use YA in your homework..