2．

　　E­waste includes everything from empty printer ink containers to broken refrigerators.As people buy new items to replace aging electronics or make upgrades，more electronic waste comes into being.In some cases，such as 2009's switch from analog（模拟）to digital television broadcasting in the United States，changes in technology are so great that old equipment may not even work at all with new systems.

　　3．

　　There are many reasons why it is important to recycle electronic waste.Much of the material used to construct electronics，including metal

　　and plastic parts，can be recycled into new items at a discount of the cost and energy use needed to create things from new raw materials.Additionally，many electronics contain poisonous substances that are harmful to the environment and could be deadly if they go into an area's groundwater.When properly recycled，they can be reused and will not do harm to the environment.Because of these environmental concerns，many areas require by law that electronic waste be properly recycled.

　　4．

　　The availability of e­waste recycling programs varies from place to place.In some areas，annual collections are held once or twice a year as a means of dealing with e­waste as well as used engine oil or other waste that is harmful to the environment.There are also some good alternatives to recycling your e­waste.Any items that are in working condition can be given to friends or donated to charities（慈善机构）like Goodwill or the Salvation Army，who rely heavily on donations.Freecycling，or passing on your unwanted items to those in need of them，is also a means of finding new homes for used items.

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