Interest has increased over the past few years in using environmentally friendly lubricants. The purpose of this course is to provide information on the challenges in working with environmentally friendly lubricants. As part of this process, the confusion about what is an environmentally friendly lubricant and what is biodegradable is discussed. Two of the key detrimental properties for environmentally friendly lubricants are covered along with some of their main applications. Two government sponsored programs (the US Biopreferred Program and the European Union Eco-Label Program) are reviewed with details provided on what testing is needed to comply with both. Examples are given of guidelines for specific lubricant applications. The course will conclude with an assessment of the future of environmentally friendly lubricants.