By Fernando Gimeno Quito, Jun 2 (EFE).- Residents of the Choco Andino, a UN-designated biosphere reserve just 90 minutes from downtown Quito, have secured a referendum on a proposal to ban mining from the territory where Andean spectacled bears frolic and more than 3,000 different species of plants flourish. Encompassing an area of 286,000 hectares …