Drivers of electric cars can charge their car for free at the Easton Walmart. The store recently opened the first public charging station in partnership with American Electric Power. More charging stations are popping up around Ohio as electric cars like the Chevy Volt and Nissan Leaf become more popular. American company, ECOtality (pretty cool stuff there!) provided the charging stations. –Columbus Dispatch
Walmart is also trying to innovate its shipping fleet with hybrids, biodiesel, etc. They estimate they could save $300 million.