There is a downside to new tech and that is what we are doing with our old tech, most us apparently throw it away and from there it more often than not ends up in a landfill site.
However, this is not a small problem as this is something that is growing all of the time as it can mean anything from old mobile phones to computers. What makes this worse is that there are toxic chemicals and precious metals built into some devices.
This graphic by Server Monkey shows just how much stuff is thrown away in the US alone, so we can just imagine how much e-waste is thrown away and buried in landfill on a global scale.
Source [Newswatch National Geographic]