Energy efficiency The addition of insulation to the outside walls of a house Use of fluorescent rather than incandescent Lower the thermostat setting Some temperature reduction can often be tolerated without undue discomfort, but carrying this approach too far may mean that saving energy carries with it a sacrifice of comfort on the part of the home occupants This element of sacrifice may appear in many situations Walk or ride a bicycle rather than driving a car Hanging the laundry out to dry rather than using a clothes dryer 复旦大学环境科学与工程系 Department of Environmental Science and Engineering, Fudan UniversityEnergy efficiency The addition of insulation to the outside walls of a house Use of fluorescent rather than incandescent Lower the thermostat setting Some temperature reduction can often be tolerated without undue discomfort, but carrying this approach too far may mean that saving energy carries with it a sacrifice of comfort on the part of the home occupants. This element of sacrifice may appear in many situations. Walk or ride a bicycle rather than driving a car Hanging the laundry out to dry rather than using a clothes dryer