No. There are many hidden miles in the supply chain. Most studies do not account for this as it is hard to track. The only number you can be sure of is from your supplier to your project site.

It is safe to assume that the further your stone is mined from your project, the higher the transportation emissions are. This is why we have created options for local stone vs. imported stone. It is the most accurate way we can differentiate given available data. Future calculator versions will include close to a dozen different forms of transportation options so you can estimate emissions from sources all over the globe.

It’s best to stay local when you can.