Snow has fallen in the Sahara desert. This, obviously, is not normal. The Sahara does not normally get snow, so something must have changed; put simplistically, this is a result of climate change.
We can't assume that based on one incident. The snow is weather, not climate. It very well could be linked to some change though.
Climate trends change over tens or hundreds of years or even longer. This is a one off and can't be seen as a trend. It snowed there in 1979.
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