Apple has launched the iPhone 5 with a bigger screen, a better processor, and lots of cool features. If the pre-order figures of the phone are anything to go by, the company will sell millions of units in the next few months. But what will happen to the old phones that we already have? Well, if we dump our old phones in garbage, we’ll just add to the already huge amount of e-waste that’s getting piled up in the landfills. According to an e-waste survey conducted by iYogi, 28% of the respondents have junked their old PC at least once. This would have probably ended up in a landfill, which would cause environmental pollution.