By Akhtar Soomro and Syed Raza Hassan KARACHI (Reuters) – Mulazim Hussain is proud of the trees he has planted. Surrounded by neem saplings and vegetables sprouting up from scrubland in the Clifton district of Pakistan’s largest city Karachi, the 61-year-old recalls a time a few years ago when the area was a giant, informal rubbish tip. “Now there is greenery and happiness, children come in the evening to play, people come to walk,” he said, speaking near a patch of trees amid a barren expanse bordered by the sea on one side and tower blocks and offices in the distance on the other. “I have ra…

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