Apple sold a record 5 million iPhones the first weekend the phone was on the market. And unlike in the iPhone's early days, the latest Apple smartphones are not primarily being purchased by first time owners.
But did you ever stop to think about what happens to all those iPhone 3, 3GS, 4 and 4Ss now deemed out of date? While there are many recycling programs available, most smartphones are not efficiently thrown out.
Apple's iPhones is far from the only culprit -- most every smartphone, hard drive, hybrid car, satellite, MRI machine and GPS, along with dozens of other tech gadgets, are made from Rare Earth Elements.