To be fair Perseng, I am referring to radical Greens extremists ... they advocate the immediate end to using any fossil fuels whatsoever ... The Greens themselves prattle on about going to unworkable levels of renewables and can't grasp the need for a diverse energy base ... without fossil fuels planes, trains and ships don't operate, ammonia based fertilisers cannot be manufactured, heavy machinery for construction and agriculture can't operate and so on ... fossil fuels are pretty much the sole reason the earth's population is 6 going on 7 billion ... without fossil fuels, they simply could not be fed.