Walmart recently announced that as part of moves to cut 20 million
metric tons of greenhouse gas from its supply chain by the end of 2015, it is demanding stricter
quality and environmental standards from its Chinese suppliers, and is looking at factories»
air emissions and management disposal of hazardous waste.
Prior studies have provided compelling demonstrations of the importance of linkages between climate change and
air quality valuation (e.g. (Caplan and Silva 2005; Nemet et al. 2010; Tollefsen et al. 2009)-RRB- and of the incorporation of economics into emission
metrics (e.g. (Johansson 2012; Tanaka et al. 2013)-RRB-, but typically have not fully represented the climate impact of short - lived emissions, especially aerosols and methane (e.g. (International Monetary Fund 2013; Muller et al. 2011; NRC 2010)-RRB-.