SUROBI/QARGHAYI, Feb. 24 (Xinhua) -- In Afghanistan, a land rich with untapped natural bounty, vast reserves of coal, gas, wind-swept valleys, cascading rivers, and relentless sunshine, millions of citizens continue to light their homes with kerosene lamps, power their businesses with expensive generators, or simply adapt to darkness. In the rugged terrain of Qarghayi district, Laghman province, nestled adjacent