BC
2009-12-08 18:15:56
Yeah, right. For sh*ts and grins, try estimating the percentage of the entire atmosphere (to, say, 10 miles high) that will pass through engines of any and all sorts over a 20 yr period.
Yeah, right. For sh*ts and grins, try estimating the percentage of the entire atmosphere (to, say, 10 miles high) that will pass through engines of any and all sorts over a 20 yr period.
