ABSTRACT
This chapter explains the technologies necessary to realize the magnesium-recycling society. Magnesium-smelting facilities and desalination plants will possibly generate new industries. In regions that do not have infrastructure such as power transmission lines, usage of electric appliances will be possible with magnesium air batteries. If the dream of a magnesium-recycling society comes true, it would largely reduce greenhouse gases coming from transportation and power stations. In September 2009, Prime Minister Hatoyama promised to the world that Japan would reduce its greenhouse gas emission by 25% compared to 1990. Because greenhouse gas emission in 1990 was 1,261 million tons, with a 25% reduction, it would be reduced to 946 million tons. A 25% reduction compared to 1990 does not solve the problem because greenhouse gas emission became 1,374 million tons in 2007, a 9% increase.
