Get gold from your old sim card?

 Around 45 million tons of electronic waste is dumped into garbage.All this contain many precious metals.  Gold worth more than $ 20 billion was simply thrown away as electronic waste. Other precious metals, such as silver, copper, platinum and palladium, are also discarded. Researchers hope that this new method can help limit the amount of raw material waste in the future - and even, perhaps, reduce the amount that currently accounts for landfills.