⑵ For many firms that do business in Europe, the certification of their recycling processesfrom the International Standards Organization is a must-have. Toxic materials such aslead, mercury and other heavy metals are used liberally in electronic devices, andburying them in landfills poses a future hazard if the metals leak into groundwater.While European countries have stringent recycling regulations, government mandatesin the United States are less demanding. In America, large corporations are at theforefront in pushing for electronics recycling.（20 分）