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 Sweden are obliged to buy enough certificates to cover a set proportion of their use). Sweden also shows its leadership in international cooperation and competence on the climate change issues. Sweden actively took part in some international climate policy programs, such as Prototype Carbon Funds (PCF) and Activities Implemented Jointly (AIJ) Public participation is quite important in addressing climate change and its effects and developing adequate responses. Without the support of the public, it is impossible to implement a new policy instrument successfully. For example, one cannot anticipate that bio ethanol and bio diesel could be widely consumed without support and