Climate change in Japan and Toyota hybrid electric vehicles were named to have the highest fuel efficiency and lowest emissions. The fuel economy and emissions decrease is due to the advanced technology in hybrid systems, biofuels, use of lighter weight material and better engineering. As a signatory of the Kyoto Protocol, and host of the 1997 conference which created it, Japan is under treaty obligations to reduce its carbon dioxide emissions and to take other steps related to curbing climate change. The Cool Biz campaign introduced under former Prime Minister Junichiro Koizumi was targeted at reducing energy use through the reduction of air conditioning
Climate change in New York City invested to improve building energy efficiency, and an additional $1 billion allocated to preserving NYC's drinking water. New York in 2009 launched a task force to advise on preparing city infrastructure for flooding, water shortages, and higher temperatures. The New York City water supply system has been built to provide for its water needs. The NYC Mayor's Office Climate Policy and Programs team is investing $20 billion to adapt the city's neighborhoods to climate change threats like flooding, heat, and sea level rise. Reducing one’s carbon emissions is easier said than done. "An Inconvenient Truth" by Al Gore suggests several