1. Coca Cola's high volume growth would indicate a potentially harmful world with persuasive advertising and harmful health effects. 2. The railroad industry faced a period of poor economics due to regulation, powerful unions, and better substitutes, but eventually turned around due to cost advantages and efficient management. 3. The freight railroad industry has reached a point where further growth is unlikely due to existing infrastructure and land use restrictions, and continued growth is not necessary, but maintaining good economics can pave the way for future companies with similar advantages.

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