Yahoo Inc. aims to wield its power as the biggest US Internet media company to encourage millions of consumers to take basic steps to help the environment as part of its corporate push to confront global warming. [Yahoo] is...introducing Yahoo Green, an online education program that will offer users the latest environmental news, consumer tips and ways to be personally and socially active in combating climate change…Yahoo has joined a growing number of big US companies that are putting corporate resources behind efforts to cut carbon greenhouse gases in business operations and to push for policy changes with local and national government...[also refers to Google, Microsoft, News Corporation]