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

In announcing the order Friday, Mercedes said it would also join a climate initiative established by Amazon founder Jeff Bezos. By signing up to The Climate Pledge, Mercedes-Benz commits itself to going completely carbon neutral by 2039.

Scientists say man-made emission of greenhouse gases such as carbon dioxide must end by 2050 at the latest to avoid pushing global temperatures beyond the threshold of 1.5 degrees Celsius (2.7 Fahrenheit) set out in the Paris climate accord.