The Gold Rush of the 1800s is inextricably tied to USA history. Mining towns popped up wherever precious metals could be extracted, with many of these towns and mines now lying abandoned as ghostly reminders of the old wild west. Abandoned mine land poses a threat to environmental and human health, and methods to rehabilitate this land has gathered much interest over the past few years. Dr Carlos Rodriguez-Franco and Dr Deborah Page-Dumroese from the US Department of Agriculture have been evaluating the use of biochar as a sustainable method to remediate abandoned mine lands.