What does the giver say happened to the experience of snow

Jonas learns that the memory is from the distant past and that Climate Control and landscape adjustments got rid of snow and hills in order to make transportation and agriculture easier. Now, instead, the community has Sameness, which both Jonas and the old man regret.

The first memory he receives is that of sledding in the snow. Snow and the feeling of coldness are new experiences for him. He feels himself on a sled, moving downhill, and even the concept of a hill is new to him. He finds the sled ride experience exhilarating, but this leads him to question the Giver.

The gober says that the memory of snow got more distances, or faded away