Professor Harrison, an American linguist, said: imagine that if the whales are going extinct for no reason, or if the pyramids are about to collapse and the Amazon forest is cut down, people will be very angry and try their best to stop it. Because those are the common heritage of mankind and are visible to the naked eye.Language is the wealth of more ancient, complex and sophisticated human beings and each language is a unique ideological world that reflects a unique way of human existence.Every language has unlimited expression possibilities, unlimited collocation possibilities and their vocabulary, pronunciation system and grammar are combined in an exquisite structure that is greater than any building built by our hands.
The statement 'Language, like the ecological environment, is the common property of mankind' is what the professor is meant to emphasize in this passage.