We evaluate the minimum energy input rate that starbursts require for expelling their newly processed matter from their host galaxies . Special attention is given to the pressure caused by the environment in which a galaxy is situated , as well as to the intrinsic rotation of the gaseous component . We account for these factors and for a massive dark matter distribution , and develop a self-consistent solution for the interstellar matter gas distribution . Our results are in excellent agreement with the results of Mac Low & Ferrara ( 1999 ) for galaxies with a flattened disk-like ISM density distribution and a low intergalactic gas pressure ( P _ { IGM } / k \leq 1 cm ^ { -3 } K ) . However , our solution also requires a much larger energy input rate threshold when one takes into consideration both a larger intergalactic pressure and the possible existence of a low-density , non-rotating , extended gaseous halo component .