CO2 Plus reports the concentration of carbon dioxide in the atmosphere, as measured by the U.S. NOAA's Mauna Loa Observatory [1].
The first value is the previous week's average, and the second value is the weekly average taken a year ago.
This watchface uses the API developed by HQCasanova [2].
CO2 Plus is configurable, allowing the user to choose from 6 date modes encompassing U.S. and European formats.

[1] http://www.esrl.noaa.gov/gmd/ccgg/trends/weekly.html
[2] http://www.hqcasanova.com/en/projects/co2.php

CO2 reports the concentration of carbon dioxide in the atmosphere, as measured by the U.S. NOAA's Manua Loa Observatory ( http://www.esrl.noaa.gov/gmd/ccgg/trends/weekly.html ). The main value is the previous week's average, and it is compared to the weekly average taken 1 year ago and 10 years ago. This watchface uses the API developed by HQCasanova ( http://www.hqcasanova.com/en/projects/co2.php ).   

Photon Date is a sleek, modern watchface. The numbers are inspired by the famed Eurostile typeface, but they have been optimized to render well on the Pebble display. 

A configuration window allows you to select white-on-black/black-on-white and day of the week/month/nothing. In 24-hour mode, the date is hidden from 20:00 to 23:59.

For a version without the date and a more faithful typeface, check out Photon.

Photon is a sleek, modern watchface. The numbers are inspired by the famed Eurostile typeface, but they have been optimized to render well on the Pebble display. Photon can be configured to support white-on-black and black-on-white color schemes.

For a version that shows the day and date, check out Photon Date.

This is a retro watchface with an embossed effect which gives the numbers a subtle three-dimensional feel.

Neutrino is a sleek, modern watchface that shows the time with seconds and the date. It is descended from our Odyssey watchface.

A configuration window allows you to select white-on-black/black-on-white and day of the week/month.

For a version without seconds, check out our Quark watchface.

Quark is a sleek, modern watchface that shows the time and the date.

A configuration window allows you to select white-on-black/black-on-white and day of the week/month/nothing. In 24-hour mode, the date is hidden from 20:00 to 23:59.

If you like this format, check out our other watchfaces, Odyssey Big, Galaxy, and Photon Date. For a version with seconds, check out Neutrino.

Galaxy is a retro-style watchface with time and date. It is similar to our Quark and Odyssey Big watchfaces, but with a more dramatic look. 

A configuration window allows you to select white-on-black/black-on-white and day of the week/month/nothing. In 24-hour mode, the date is hidden from 20:00 to 23:59.

This is a large-number variant of our popular Odyssey retro-style watchface. 

A configuration window allows you to select white-on-black/black-on-white and day of the week/month/nothing. In 24-hour mode, the date is hidden from 20:00 to 23:59.

If you like this format, check out our other watchfaces, Galaxy, Quark, and Photon Date.

Odyssey is a retro-style watchface inspired by the late-1970s video games. The horizontal and vertical lines render very crisply on Pebble's display.

A configuration window allows you to select white-on-black/black-on-white and day of the week/month.

If you're looking for a version without seconds, check out Odyssey Big. For a more modern-looking version, check out Neutrino.