1. A tree grows and increases its mass. Explain why this phenomenon is not a violation of the law of conservation of matter. 2. If there is no “away” where organisms can get rid of their wastes, why is the world not filled with waste matter? 3. Someone wants you to invest money in an automobile engine, claiming that it will produce more energy than the energy in the fuel used to run it. What is your response? Explain. 4. Use the second law of thermodynamics to explain why a barrel of oil can be used only once as a fuel, or in other words, why we cannot recycle high-quality energy.