Business Green: Legislators in California are considering proposals that could result in black cars being banned as part of efforts to curb air conditioning use and improve fuel efficiency. The California Air Resources Board (Carb) has set out proposals for consultation that would require all car paints and coatings to achieve 20 per cent solar reflectivity. In a presentation delivered earlier this month, Carb said that the legislation – which would also require car windshields to reflect at …