A plumber explains the “Bathtub Model”
Have you heard of the “Bathtub Model” for expaining CO2 accumulation? I hadn’t until last week, when I attended the sustainability symposium at Baldwin-Wallace College. Dr. Susan Solomon, who was the lead author of th 2007 IPCC report on global climate change, was the one who introduced the concept. Here’s a much more succinct description from, appropriately enough, a plumber.
Picture a bathtub with a running faucet and open drain. When we use energy, carbon dioxide (CO2) pours into the atmosphere just like water pours into a bathtub. If water pours into the tub faster than it can drain out, the tub fills with water. The bathtub stays full until more water is draining out than is pouring in. The same concept applies to CO2. At our current rate of energy consumption, CO2 emissions produced by burning fossil fuels are pouring into the atmospheric bathtub twice as fast as they are draining out.
Everyone can do something about CO2 emissions, and some of those changes are relatively easy to make – as the good folk at Raymond Plumbing go on to explain. For instance, using high-efficiency heating and cooling and Energy Star certified appliances. Even simple steps, like turning down the thermostat on the hot water heater will help – and save money, too.