Description: If the prices of goods and services do not include the cost of negative externalities or the cost of harmful effects they have on the environment, people might misuse them and use them in large quantities without thinking about their ill effects on the environment.
Jet lag. Jet lag is a mismatch between your body clock and the local time wherever you are. It's caused by rapid travel across time zones. Jet lag is also compounded by the fact that long hours spent on a plane can cause you to sleep too much, or not enough, possibly at the wrong time of day relative to where you departed from.
Quick Answer. There are 24 different time zones in the world set at 15 degree longitude intervals in between. The Earth completes one full rotation in 24 hours at a speed of 15 degrees per hour. The premise behind time zones is that the world is theoretically divided into 24 equal longitudinal zones and the time is accordingly adjusted in each zone by an hour.