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 five companies (BP, Chevron, ConocoPhillips, Exxon Mobil, and Royal Dutch Shell) most responsible for climate change, and divesting the City's pension funds from fossil fuels, the first major US city to do so. Mayor Bill de Blasio stated in support of the decision, "As climate change continues to worsen, it's up to the fossil fuel companies whose greed put us in this position to shoulder the costs of making New York City safer and more resilient." The OneNYC program as of 2018 made progress towards renewable energy reliance; for instance, solar installations have increased six-fold since 2014, $500 million was