Have you found someting changed about weather?

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Have you found something changed about weather? You should compare with you are young. When i was young, the winter was very cold. The river was iced. People can have a walk on the river. But the temperature was higher year by year. From people can't walk on the ice to there is no ice in river. And the snow is little this years. Do we say the temperature is become warm? But I found another situation. When i was young. One of my friend went to swim on children's day (6-1). But acturally we can't swim in the river on this children's day. Because the water is so cold. Shall we say the temperature is become cold? But I think it's very comfortable for body because the temperature is not very hot and cold. I don't know if it is benefit for our earth? What's your opinion? Do you find ,and can you share to us?