prize1-8, Exercise 1: Cold week, warming climate

Model answer:

A cold week is weather, and climate is the average and variability of weather over thirty years or more. One cold week in one place says very little about the long-term trend, just as one hand of cards says little about the whole deck. Cold weeks still happen in a warming climate; what matters is whether the average over decades, and across the globe, is rising, and the records show that it is.