Seven islands in the Arabian Sea sum up the South Asian city where smog and soot stain the snot. Sensory overload; a civilized shamble where the sun sizzles and silence is scarce.  Screeching streetcars and speeding cyclists saturate streets; swarms shove at subway stations.  Social class a stand-out split between the silk stockings and the starving.  Scores of shiney saris scramble just before sunset for suppertime sales of seeds and spice.  Skinny schoolchildren salivate over the scent of sumptuous samosas; sugar-savages storm sweet shops. Seductive street snacks secure a sick stomach due to slipshod sanitation.     Sixty-two percent of slum-dwellers short on sustenance; a sad statistic of sorrow and suffering.…