Sentences with phrase «when coal beds»
Back when the coal beds were laid down the world was 5 - 6 degrees warmer, and CO2 levels were 1500 - 2000ppm.
http://www.theoildrum.com/ Not exact matches
The bed of coals was easily height adjustable; i.e., when the coals burn down, you could just raise them by turning a knob while fire is on.
Backup coal - fired power from Victoria, on demand, when the wind stopped blowing or it was night time and the SA solar panels went to bed.