‘Solar powered vacuum cleaners’: the native plants that could clean toxic soil

Indigenous groups see hope in the environmentally friendly process of bioremediation. But will cities pay attention?It almost looked like a garden. In Taylor Yard, a former railyard near downtown Los Angeles, volunteers knelt down to tend to scrubby plants growing in neat rows under the sweltering sun.But beneath the concrete of the 60-acre site overlooking the Los Angeles River, the soils were soaked with an assortment of hazardous heavy metals and petrochemicals like lead, cadmium, diesel, and