Speaking of difficulties, the challenge ramps up pretty solidly — Basic gives you a chance to learn a song with a few inputs, Expert more closely follows the beat of the song and multiplies the number of inputs, and Ultimate just throws rhythm out the window and expects you to hit the most random shit possible, like long strings of single inputs during a period of silence. (crunchyroll.com)
8000 series aluminum conductor per ASTM B800, Class C compact strand per ASTM B801 or single input wire stranding per ASTM B836. (windsystemsmag.com)
Fossil fuels are obviously a significant input — the biggest single input but agriculture in its broadest sense along with other land use changes contribute a lot. (johnquiggin.com)