Some comments: 1) The tagline at the top "since 1958" makes it seem like the website is since 1958, instead of the data. Obviously false, but may reduce trust

Some comments: 1) The tagline at the top "since 1958" makes it seem like the website is since 1958, instead of the data. Obviously false, but may reduce trust. 2) The graph is good, I like it! 3) In the Data Sources section, it would be very helpful to have a link to the original data. Don't make me hunt for it. I was wondering if this was an average of multiple locations or from a single location. 4) It may be helpful to have a link or explanation about the yearly period of the CO2 level. Something like https://www.co2.earth/seasonal-co2-cycle https://www.co2.earth/seasonal-co2-cycle.