By NGT News.

President Barack Obama has issued an executive order requiring the federal government to reduce its direct greenhouse-gas (GHG) emissions by at least 40% over the next decade. Although the comprehensive order calls for federal agencies to use more renewable energy, become more energy efficient, and reduce water intensity, it also mandates that their fleets cut per-mile GHG emissions by 30% by fiscal year (FY) 2025 and incorporate more zero-emission vehicles (ZEVs) and plug-in hybrid electric vehicles (PHEVs).