I had a hard time making this connection myself early on, but I finally came to realize that chemistry is rad. Your body has an awful lot of water in it, right? H₂O molecules right there. What else do you care about? Are you interested in global warming? Greenhouse gases are molecules in our atmosphere that absorb energy and keep Earth warm. There are chemical reactions happening everywhere, like photosynthesis or rusting or just about anything else going on.

You could just as easily ask "how does the weather affect my life?", and the answer would be the same. Sure, you can carry umbrellas and wear different clothing when it's raining or cold and such. In the big picture, however, weather determines what kind of food and how much of it can be grown, thus determining whether or not your life is even possible.

Chemistry is the same way: it may not matter to you on a day-to-day basis exactly what your body and the world around you is made of, but nonetheless these principles are what make life possible. As a voter, you are going to be making decisions based on chemistry in the future that will affect the environment and therefore affect you. If yourself and the rest of us make unwise choices, it may result in our destruction.