cliparts/b/8/2/d/clipart-eco-green-quatrefoil-icon-b82d.svg image/svg+xml Open Clip Art Library eco green quatrefoil icon 2012-05-27T16:54:50 http://openclipart.org/detail/170254/eco-quatrefoil-icon-by-cybergedeon dominiquechappard clip art clipart ecology green icon quatrefoil