This may include the fossil fuel used to transport the food that you buy at your local grocery store, or the energy used to deal with the waste produced in your household.

　　Taking small steps to reduce your carbon footprint and saving energy is actually fairly simple.

　　4

　　It requires the burning of fossil fuels to make the bottle, transport it and get rid of it if it's not recycled.

　　Compared with it, in­house filtration(过滤) systems can reduce your influence and cost for water.

　　Unplugging appliances that are not frequently in use is another way to reduce your carbon footprint. Most of these items have a standby mode(待机模式) that wastes energy even when they're not in use.

　　5

　　What is more, new energy efficient light bulbs, filters, and appliances could also help reduce your carbon footprint.

　　In a word, less energy used means less greenhouse gas produced. With easy steps, you are on your way to reducing the size of the carbon footprint left behind.

　　A. Cutting off power is the best way to ensure that unnecessary energy is not lost.

　　B. For instance, the use of bottled water leaves a rather significant carbon footprint.

　　C. What fossil fuels may lead to carbon footprints?

　　D. However, wherever we go, we actually leave two sets of footprints.

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