Sydney, Australia. Sydney is a member of the Carbon Neutral Cities Alliance, and has received an “A” grade from cdp.net’s climate ranking. Sydney has set an interim target to reduce its carbon emissions by 70% by 2030 and to become net-zero by 2050. The City’s vision is a city of super-efficient buildings running on renewable energy. This means refining a data-driven approach to emissions. “Sydney: Data-driven Approach to the Low-carbon Transition”. www.cdp.net