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The article looks at how the twentieth century was the wettest in northern Pakistan in the last 1,000 years. Scientists analyzed core samples from juniper trees to asses the rainfall patterns. If trees get too dry, their trunks grow less than they do in wetter times. Juniper tree core samples showed that the amount of precipitation in Pakistan has increased considerably since the beginning of industrialization. The changes in the water balance could have a greater impact on the ecosystem and on people than a change in temperature alone.