Thirteen large corporations have signed the White House's American Business Act on Climate Pledge, with companies such as UPS, Coca-Cola and PepsiCo using "greener" fleets to help meet carbon footprint goals. The White House said the campaign would add $140 billion in low-carbon investments. 

The 13 companies include Alcoa, Apple, Bank of America, Berkshire Hathaway Energy, Cargill, Coca-Cola, General Motors, Goldman Sachs, Google, Microsoft, PepsiCo, UPS, and Walmart.

Coca-Cola pledges to reduce the carbon footprint to put "the drink in your hand" by 25 percent by 2020. Coca-Cola is planning an across-the-board reduction of greenhouse gas emissions by 25 percent by 2020. This goal will prevent approximately 20 million metric tons of carbon emissions annually by 2020, the company estimates in its 2014/2015 sustainability report published July 28.

Coca-Cola's distribution trucking fleet accounts for approximately 4 percent of its value-chain emissions, according to company. Its global fleet, which includes trucks operated by Coca-Cola and its bottling partners, emitted an estimated 3.7 million metric tons of greenhouse gases in 2014.

The company will continue to add delivery trucks powered by a mix of alternative fuels, including electricity, natural gas, diesel-electric and biodiesel.

PepsiCo will stand by its ongoing goal of reducing greenhouse gas emissions from their global fleet through the use of electric, hybrid, compressed natural gas, alternative fuel vehicles and other fuel efficiency programs.

UPS plans to double its goal of a 20 percent reduction in greenhouse gas emissions by 2020, as measured by the UPS Transportation Intensity Index. By 2017, the company wants to reach a cumulative 1 billion miles of package or freight movement in its alternative fuel and technology truck fleet, which it expects will be over 7,700 trucks by the end of 2015.

Currently the UPS fleet includes approximately 5,800 alternative fuel and advanced technology vehicles. The company counted more than 5,000 at the end of 2014. Since 2013, the parcel delivery service has increased the total number of alternative fuel and advanced technology vehicles by 61 percent, including more than 1,100 natural gas vehicles added in 2014 to nearly double our natural gas fleet.