February 5, 2021. Amazon.com Inc has ordered hundreds of trucks that run on compressed natural gas (CNG) as it tests ways to shift its U.S. fleet away from heavier polluting trucks, the company told Reuters.

The coronavirus pandemic caused delivery activity to surge in 2020, with truck volumes exceeding 2019 levels on average while passenger car traffic fell. But that increase in road activity means more pollution, as heavier-duty trucks emit higher levels of greenhouse gases than passenger vehicles.

“Amazon is excited about introducing new sustainable solutions for freight transportation and is working on testing a number of new vehicle types including electric, CNG and others,” the company said in a statement.

Amazon has ordered more than 700 natural gas class 6 and class 8 trucks so far, according to the company. The online retailer’s sales rose 38% in 2020; it plans to run a carbon neutral business by 2040.

The engines, supplied by a joint venture between Cummins Inc and Vancouver-based Westport Fuel Systems Inc, are to be used for Amazon’s heavy duty trucks that run from warehouses to distribution centers. More than 1,000 engines that can operate on both renewable and non-renewable natural gas have been ordered by the supplier.

Natural gas emits approximately 27% less carbon dioxide when burned compared with diesel fuel, according to the U.S. Energy Information Administration.