BBC Future Planet carbon footprint article

I read an interesting article on how the BBC Future Planet staff calculates the carbon footprint associated with researching, writing, and digitally publishing an article.  This carbon footprint information is at the bottom of each article.  In general, they look at carbon emissions associated with travel and carbon emissions associated with digital publishing.  Per the article: “As a whole, the internet would be the sixth greatest emitter of greenhouse gases if it were a country.” The BBC calculation for the digital publishing carbon footprint for an article evaluates factors such as how long a page takes to load, and an average estimate of how many users access the page using a smartphone vs a laptop or desktop.  (Accessing a webpage using a smartphone uses less energy.) 
The carbon footprint calculation for transportation evaluates the emissions from travel for that specific article.  They use a BBC-developed software that provides information for airplane, train, bus, car, etc. travel.  When possible, reporters do their research without travel. 

It’s a fun article to read and brought up some interesting sustainability topics for me to consider as I go through my day.  Here’s the link to the article. 
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https://www.bbc.com/future/article/20200131-why-and-how-does-future-planet-count-carbon