The online marketplace says 98% of its fossil fuel footprint comes from getting packages to your door. Etsy, which said it’s been calculating its emissions since 2013, said buyers and sellers on its website generated 135,459 metric tons of carbon dioxide equivalents from shipping last year, or about 98 percent of the company’s entire carbon footprint. That’s the same amount of emissions from the electricity used to power more than 23,000 homes for one year.