TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: Certain air pollutants form acid liquid when dissolved in water droplets in the air.

SOLUTION: Certain air pollutants form which liquid when dissolved in water droplets in the air?

PROBLEM: Momentum is directly related to both mass and velocity.

SOLUTION: Momentum is directly related to both mass and?

PROBLEM: Flowers pollinated by wind generally lack brightly colored parts.

SOLUTION:
Flowers pollinated by what means generally lack brightly colored parts?