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.
Toggle Fn Lock. This can often be toggled with an âFn Lockâ key, which functions like a Caps Lock key. Toggle the Fn Lock on and the keys will function as if youâre holding down the Fn key all the time, just as the Caps Lock key makes your letter keys function as if youâre holding down the Shift key all the time. Depending on your keyboard, you may actually have a dedicated âFn Lockâ key. If you donât, you may have to press the Fn key and then press an âFn Lockâ key to activate it. For example, on the keyboard below, the Fn Lock key appears as a secondary action on the Esc key. To enable it, weâd hold Fn and press the Esc key. To disable it, weâd hold Fn and press Esc again. It functions as a toggle just like Caps Lock does. Some keyboards may use other combinations for Fn Lock. For example, on Microsoftâsâ Surface keyboards, you can toggle Fn Lock by holding the Fn Key and pressing Caps Lock.