Climate change is a global phenomenon and a challenging reality for thinkers, planners, policymakers and professionals alike. It is a phenomenon that is likely to impact almost every sector of Pakistan’s economy. Today it stands not only as a major environmental issue but also as a multi-dimensional developmental issue. It was in this backdrop that the Planning Commission of Pakistan set up a ‘Task Force on Climate Change’ (TFCC) in October 2008 to provide appropriate guidelines for ensuring security of vital resources of the country such as food, water and energy. The key task assigned to the TFCC was to contribute to the formulation of a climate change policy that would assist the government in pursuing the paramount goal of sustained economic growth by appropriately addressing the challenges posed by the climate change.
Are global temperatures on a warming trend? It is di¢ cult to be certain about trends when there is so much variation in the data and very high correlation from year to year. We investigate the question using statistical time series methods. Our analysis shows that the upward movement over the last 130-160 years is persistent and not explained by the high correlation, so it is best described as a trend. The warming trend becomes steeper after the mid-1970s, but there is no signi cant evidence for a break in trend in the late 1990s. Viewed from the perspective of 30 or 50 years ago, the temperatures recorded in most of the last decade lie above the con dence band of forecasts produced by a model that does not allow for a warming trend.