E-waste is being produced on a scale never seen before. Computers and other electronic devices ＿＿（41）＿＿ obsolete in just a few years, leaving consumers with few alternatives but to catch up by buying newer models. Tens of millions of tons of computers, TVs, VCRs, monitors, cell phones, and other gadgets ＿＿（42）＿＿ each year. Unfortunately, in most parts of the world, the bulk of all this e-waste ＿＿（43）＿＿ landfills, where it poisons the environment. This is because it contains a variety of toxic ＿＿（44）＿＿ such as lead, mercury, and arsenic that leak into the ground. In theory, recycling seems to be a good ＿＿（45）＿＿ . However, the problem is that a large percentage of e-waste dropped off for recycling in rich countries is sold to the developing world, where its toxin may threaten the health of people living there.