One of the most important ideas in chemistry is that what we see and perceive in the macroscopic world is a result of interactions at the atomic level. This concept has tremendous explanatory power, which can help us understand some of the most important issues of our time. These issues include the need for clean water, how climate changes, how chemical energy in fossil fuels or solar power is converted into useable mechanical and electrical forms for our cars and homes; and how chemical fertilizers are manufactured to boost food production for a growing human population. The knowledge gained through chemistry allows us to make informed decisions about our future. A strong chemistry curriculum should provide the opportunity for students to solve real-world problems and convey this information to others.