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.
How to use Toshiba Function (Fn) keys. There is a row of Function keys at the top of the keyboard on every Toshiba notebook. These give you quick access to some useful functions. To activate them, just press the FN button on the keyboard together with the function key to activate the following commands.ow to use Toshiba Function (Fn) keys. There is a row of Function keys at the top of the keyboard on every Toshiba notebook. These give you quick access to some useful functions. To activate them, just press the FN button on the keyboard together with the function key to activate the following commands.