No, extreme snowfall over the course of a season does not cast doubt on the theory of global climate change. Climate change refers to long-term changes in temperature, precipitation, and other weather patterns. Even though there might be a heavy snowfall in one area, it doesn't mean that the overall climate isn't changing. Climate change causes the Earth's average temperature to increase, and this can lead to more extreme weather events such as heat waves, droughts, and heavy rain. But, it is important to remember that weather and climate are not the same thing. Weather is the condition of the atmosphere in a certain place at a certain time, like whether it's hot or cold or whether it's snowing. Climate is the average weather over a long time in a certain area. So, just because it snows a lot in one place, it doesn't mean that the climate isn't changing.