Fifteen years from now, renewable energy supply in eight major economies will collectively more than double. An analysis by global research organization World Resources Institute shows that national climate plans open up the possibility to use clean and affordable power to millions of people worldwide. By 2030, total clean energy supply from eight of the world’s 10 largest greenhouse gas emitters (Brazil, China, the European Union, India, Indonesia, Japan, Mexico and the United States) will increase to 20,000 terawatt hours from around 9,000 terawatt in 2009. A clean energy supply is a major step towards reducing carbon emissions. And this is not just crucial for environmental reasons, but also for our wallets. Economists at New York University just published a new report which shows that international efforts to reduce carbon emissions have already benefited the United States around 200 billion dollars. They looked at aspects like reduced healthcare costs and reduced agricultural damages from carbon emissions.