This month, more than 6,000 employees signed onto a letter demanding Amazon distance itself from big oil companies and develop a more aggressive timeline to reduce its carbon footprint. Without acknowledging the letter’s demands, Amazon spokespersons pointed to a recent blog post promising that the company would release its carbon footprint data in 2019 and a vague plan to reach 100 percent renewable energy at data centers by an unspecified date. Amazon, one of the most profitable companies in the world, has a massive carbon footprint, because it ships millions of products throughout the world.