Did you ever need to look up a number like the amount of carbon sequestration in the soil or amount of oxygen in the seas, only to find yourself spending much more time than you wanted on the Internet or flipping through textbooks - all without much success?

Well, it didn’t happen only to you. It is often surprising how difficult it can be to find concrete numbers in the field of environmental sciences, energy and sustainability, even for properties that have been measured numerous times. To help solve this for one and all, GeoNumbers (the database of key numbers in environment, energy and sustainability) was created. Along with the numbers, you'll find the relevant references to the original literature, useful comments, and related numbers.

Though we have made an honest first try at simplifying the process of finding useful numbers, there is still much work to be done. A key challenge is filling in the large number of missing items. Another challenge involves setting up a reliable and discriminating search engine which on a first try yields the numbers a user is actually interested in finding.