Oliver Style worked happily for 10 years in Mexico, Colombia and Ecuador, getting bitten by mosquitoes and delivering projects and training programmes in off-grid photovoltaic systems, efficient biomass cooking stoves, and water supply systems, for the NGO Concern America. Based in Barcelona, Spain, he currently works as a consultant for Concern America's appropriate technology programmes, alongside work as a Passive House designer. ITACA is a self-managed appropriate technology organisation working in the following areas: renewable energy, water supply systems, and barefoot construction. www....