Agence France-Presse: China’s dependency on coal as its major energy source is creating hidden environmental and other costs worth more than seven percent of its annual gross domestic product, green groups said Monday. A report entitled: “The True Cost of Coal”, jointly commissioned by Greenpeace, the Energy Foundation and conservation group WWF, said taking into account the real expense was vital to the nation’s future energy security. The unaccounted costs equate to an estimated 1.7 trillion yuan …