KARACHI: A large volume of industrial waste and garbage was flushed into the sea in the wake of the monsoon rains and urban flooding in Karachi last week, environmentalists and fisherfolk said on Tuesday. The downpours paralyzed Pakistan’s largest city, killing 17 people and renewing scrutiny of the city’s ability to cope with heavy rainfall. Floodwaters also swept plastic waste, bottles and chemical discharges through storm drains into the Arabian Sea, turning stretches of coastline into a dumping ground. Beaches from Manora to Korangi Creek are now strewn with heaps of trash.