Centuries: 2nd century - 3rd century - 4th century
Decades: 220s 230s 240s 250s 260s - 270s - 280s 290s 310s 320s 330s
Years: 270 271 272 273 274 - 275 - 276 277 278 279 280
... wool, hemp, and flax), and fuels (ethanol, methane, biodiesel). Electricity can be generated from methane gas of animal waste or from burning field waste and specially ...
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