Your list of chores for the day includes mowing the lawn. You:
1. Use the riding mower.
(0 points) Riding mowers, especially when you don't have a HUGE yard, are a waste of gas. Riding mowers also tend to be major air offenders by producing large amounts of pollution. Try again.
2. Put off mowing until tonight.
(1 points) Good choice. Saving this chore until later (and explaining to your parents that you aren't just putting it off!) means that the pollution emitted by the mower will not be baked by the noon day sun into ground-level ozone. There might be an even better choice, though - keep browsing.
3. Use the push mower.
(2 points) This is the best choice! Using a person-powered push mower means that no pollution will be emitted. And it helps you stay fit, too! But remember that breathing the air during an Air Quality Advisory day can be harmful, so outside activities are safest in the evening.
On to the next question.