Many business trips do not last a week. What is the traveler supposed to do on the remaining days? You referred to "commercial" air travel. Who is going to veri

Many business trips do not last a week. What is the traveler supposed to do on the remaining days? You referred to "commercial" air travel. Who is going to verify the purpose of a trip? In general, if you think air travel should be reduced for environmental reason (I don't), a tax on jet fuel would make more sense.