The Atmosphere
<span>Air Pollution & Stratospheric Ozone Depletion Climate Change</span>
The Human Population
<span>Growth Feeding the World Human Health</span>
Water
<span>The OceanWater PollutionWater Resources</span>
Non-Renewable Energy
<span>Coal Petroleum Natural Gas</span>
Waste
<span>Generation
Disposal</span>
According to Gregory Mankiw, a US teacher and economist, this example would demonstrate the economic principle of "the significance of opportunity cost in decision making". Martina had to give up going to restaurants in order to continue travelling by taxi. She probably compared the cost and benefits of packing lunch vs going to a restaurant before taking the final decision.
Because running a government is in essence that -managing a very large project involving millions of people. While there are of course differences in the way how a government and how a large project can be run, the basic idea is still there. It also teaches the person what it means to have a lot of responsibility.