I owe this 60-Second Earth gig to Steve Jobs. Without the iPod there's no podcast. But our collective lust for iPod-like gadgets has some outsized impacts on the planet. Give Jobs credit. When pushed by environmentalists, he unveiled less toxic products, eliminating nasties like arsenic and mercury. But, ultimately, each of these devices relies on substances such as coltan from warlord-ravaged Congo or illegally mined rare earths from China. Then there's all the energy used to let you listen to me. The vast server farms that allow digital storage of music, photos and everything else are the fastest growing users of electricity, mostly made from burning coal.