Amazon says it’s purchasing 1,800 electric delivery vans from Mercedes-Benz, the greatest such order for the German automaker to date.

In reporting the order Friday, Mercedes said it would likewise join an atmosphere activity built up by Amazon founder Jeff Bezos. By signing up to The Climate Pledge, Mercedes-Benz concedes to going totally carbon neutral by 2039.

Researchers state man-made emission of greenhouse gases, for example, carbon dioxide must end by 2050 at the most recent to abstain from pushing global temperatures beyond the threshold of 1.5 degrees Celsius (2.7 Fahrenheit) set out in the Paris atmosphere accord.

The transport sector, remembering the surge in deliveries from online retailers like Amazon, is a significant source of carbon emissions.

“We need continued innovation and partnership from auto manufacturers like Mercedes-Benz to decarbonize the transportation sector and tackle the climate crisis,” Bezos said in a statement.

Alluding to his own organization’s efforts to cut emissions, Bezos said that “the addition of 1,800 electric delivery vehicles is another step in our journey to building the most sustainable transportation fleet in the world, and we will be moving fast to get these vans on the road this year. ”

While the e-van order with Mercedes is Amazon’s greatest in Europe, it is predominated by an agreement it signed a year ago with U.S. start-up Rivian to deliver 100,000 electric delivery vans by 2030.

Daimler said the order involves in excess of 1,200 huge eSprinter vans and around 600 medium-sized eVito vehicles. Delivery will start later this year.