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.
The rest depends on what what kind of keyboard you have and what program you are using will determine their functions. It also depends on whether you use the F key on it's own or in combination with another key like the Alt or Ctrl keys on a PC keyboard and/or the Function key on a laptop.For instance, I have a multi functional keyboard and depending what mode it is in, it completely changes the functions of the F keys.unction keys (the F-keys) are found on most every computer, but their usage is not standard. Many programs assign special functions to these keys (hence their name), and computer manufacturers also assign system-level actions to certain keys.