My friends are all very apathetic when it comes to running their HVAC systems. They adjust the thermostat when they are uncomfortable, and they tend to leave it running without giving it much thought. I think this is extremely wasteful, and I have voiced my opinion on more than one occasion. I always get annoyed and think that I am preaching at them when I talk about these things, but we really need to be more careful about how we use energy. Using a lot of energy requires a lot of fossil fuels, and these are dirty and harmful to the environment. I try to be very cautious about how I use my air conditioner because I know that these cooling systems draw a ton of energy. I don’t want to be wasteful, so what I do is adjust my thermostat to 76°. Unless the temperature is outside become extreme, I leave it here. This ensures that my cooling system is not running incessantly, but my place till say is relatively comfortable. If I can get by by only running a fan and leaving a window open, I will do that instead. There are ways to keep the air in a house circulating without running an air conditioner. I know that most people take their cooling systems for granted, but this is not something that I want to do. I want to be more responsible and live in a sustainable way. I think that there are ways to stay comfortable without being excessive, and I want to do everything I can to make sure that I and reducing my carbon footprint.