Methane as a greenhouse gas[edit] Methane in the Earth's atmosphere is a strong greenhouse gas with a global warming potential of 29 over a 100-year period. This means that a methane emission will have 29 times the impact on temperature of a carbon dioxide emission of the same mass over the following 100 years.
Laptop computers. On laptop computers, the Fn key is almost always located on the bottom left-hand side of the keyboard, next to the Ctrl key. Chromebooks. Not all Chromebooks have an Fn key. For those that do have an Fn key, it is often found near the spacebar.
Microsoft Multimedia Keyboard and the Wretched F-Lock. Question. I am running Windows 7, and currently using a Microsoft Multimedia Keyboard 1.0a. This keyboard has a rather disconcerting feature called the f-lock, which is a key that you must press if you wish to have access to the function keys F1 thru' F12. The problem with this f-lock key is that, after you boot up, you must explicitly press it on in order to access the standard function keys.