Sri Lanka's biggest garbage mountain, growing in height day by day, at Bloemendhal Road, Colombo 13 has become a menace. It could explode if fire spreads to the methane gas emanating from the lower levels of the dump, the Colombo Municipal Council Public Health Department warned yesterday. A recent fire in a section of the dump had aggravated an already bad health hazard, residents of the area complained yesterday (26). The Colombo Municipal Council Public Health Department warned that the mountain of garbage was burning from inside even after the Sri Lanka Air Force had doused the flames engulfing its surface. The garbage mountain stands on a wetland of 22 acres and about 70