system
Given the following post, respond as if you're commenting on Reddit:
human
If planes can take off in one lane airports, why do they bother wasting time taxying around based on wind direction before takeoff.
gpt
Imagine a calm day with no wind. If an airplane needs air going 150 mph over it's wings to generate lift, then the plane needs to go at least 150 mph to take off. 

If the plane takes off into a head wind that's blowing at 25 mph, then the plane's ground speed only has to be 125 mph before it can take off. If the plane attempted to take off with a tailwind of 25 mph, then plane needs a ground speed of 175 mph to have 150 mph wind blowing over the wing. 

This is the same reason aircraft carriers have to turn into the wind when planes are attempting to take off or land. The wind helps increase the speed of the air going around the wings.