The increases in gas usage in fiscal 2015, 2016 and 2017 stemmed mainly from adoption of GHP* for air conditioning and gas cogeneration. With this step, the intent is to reduce electricity usage and the amount of energy consumed on a per-unit basis. *GHP (gas heat pumps) is an air conditioning system in which an external unit with a gas engine-powered compressor powers a heat pump for heating and cooling.
The primary cause of the increase in CO2 emissions in FY2013 is the increase in each power company's factors in CO2 emission calculations (changes every year based on fuel mix ratios) over last year.
Continuing initiatives for reducing waste generated and final amount processed has led to annual increases in recycling ratio.
The primary cause of the increase in waste water volume in FY2014 is the increase in spring in some store.