What happened to CO2 detection

Great app, but there used to be a option to check Atmospheric CO2 levels. Although it havent been updated since 2011. What happened to this option!!! Why was it never updated. And why is it now gone!

Also, why can you not see the top of the earth when you tap the visible earth tab?

Nice addition with sea salinity tab.

Id like to see the CO2 tab back, and updated...

MountainMan2012 about Earth-Now