Greenwashing (a compound word modelled on "whitewash"), or "green sheen," is a form of spin in which green PR or green marketing is deceptively used to promote the perception that an organization's products, aims or policies are environmentally friendly. Evidence that an organization is greenwashing often comes from pointing out the spending differences: when significantly more money or time has been spent advertising being "green" (that is, operating with consideration for the environment), than is actually spent on environmentally sound practices. Greenwashing efforts can range from changing the name or label of a product to evoke the natural environment on a product that contains harmful chemicals to multimillion dollar advertising campaigns portraying highly polluting energy companies as eco-friendly. In an academic paper Greenwashing has been defined as "co-creation of an external accusation toward an organization with regard to presenting a misleading green message", indicating that an accusation is necessary to speak of Greenwashing.