The Greenhouse Gas Protocol (GHG Protocol) is the most widely used international accounting tool for government and business leaders to understand, quantify, and manage greenhouse gas emissions. It serves as the foundation for nearly every GHG standard and program in the world – from the International Standards Organization (ISO) to The Climate Registry. Read more about the GHG methodology here.
The carbon disclosure project helps companies throughout the world to measure, manage, disclose and reduce their greenhouse gas emissions. More than 5600 companies and 533 cities globally have participated in the global disclosure system. Read more at https://www.cdp.net/en
The Global Reporting Initiative (known as GRI) is an international independent standards organization that helps businesses, governments and other organizations understand and communicate their impacts on issues such as climate change, human rights and corruption. As of 2015, 7,500 organizations used GRI Guidelines for the sustainability reports. Read more at https://www.globalreporting.org/
RE100 is a collaborative, global initiative of influential businesses committed to 100 percent renewable electricity. Companies joining RE100 are encouraged to set a public goal to procure 100% of their electricity from renewable sources of energy by a specified year. Read more at http://there100.org/