New York Times: “I think, after terrorism, the biggest threat we have is the environmental decay.” Tariq Yousafzai, a water and environmental engineer with detailed knowledge of his country’s water infrastructure, sees evidence of climate change in the flood disaster that inundated one-fifth of his country. But a more immediate concern of his is the massive deforestation that has silted up the waterways and left Pakistan more vulnerable to storms than ever. The scene at this reservoir created …