2The Energy Mix in Japan Post‐Fukushima
Seiji Nakagame
The Faculty of Applied Bioscience, Kanagawa Institute of Technology 1030 Shimoogino, Atsugi, Kanagawa, 243‐0292, Japan
2.1 Greenhouse Gas (GHG) Emissions by Japan
The average temperatures on Earth have been gradually noticeably increasing for the past three decades; this phenomenon is now unambiguously ascribed to increasing greenhouse gas (GHG) emissions such as emissions of CO2, methane, nitrous oxide, and other gases produced by human activity (WMO 2016). The level of atmospheric CO2 was 400 ppm in 2015, which was elevated by 122 ppm compared with pre‐industrial times, defined as before 1750 (WMO 2016). It is becoming increasingly clear that this continuing rise of the concentrations of GHGs in the atmosphere is increasing the average temperature and causing negative impacts on human society and natural ecosystems, notably by increasing the frequency and severity of major storm or typhoon events (IPCC 2015
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