I. Fill each of the numbered blanks in the following passage with a suitable word.
About two hundred years ago, man lived ....................... (1) greater harmony with his environment ....................... (2) industry was not much developed. Today the situation is quite ....................... (3). People all over the world are worried about what is happening to the ....................... (4), because of modern industry and the need for more and more energy. Newspapers and magazines ....................... (5) about water pollution, air pollution, and land pollution.
Why is there so much discussion about ....................... (6)? After all, people have been polluting the world ....................... (7) them for thousands and thousands of years. But in the ....................... (8), there were not ....................... (9) people and there was lots of room in the world so people could move to another place ....................... (10) their settlements became dirty.
Now, however, many parts of the world are ....................... (11). People live in big cities and much of our waste, especially ....................... (12) from factories, electric power stations, the chemical industry and heavy industry ....................... (13) very dangerous. Fish die in the lakes, rivers, and seas; forest trees die too. Much of this ....................... (14) waste goes into the air and is carried by the ....................... (15) for great distances.
I. Fill each of the numbered blanks in the following passage with a suitable word.
About two hundred years ago, man lived in (1) greater harmony with his environment because/ since/ as (2) industry was not much developed. Today the situation is quite different (3). People all over the world are worried about what is happening to the environment (4), because of modern industry and the need for more and more energy. Newspapers and magazines write (5) about water pollution, air pollution, and land pollution.
Why is there so much discussion about pollution (6)? After all, people have been polluting the world around (7) them for thousands and thousands of years. But in the past (8), there were not many (9) people and there was lots of room in the world so people could move to another place when (10) their settlements became dirty.
Now, however, many parts of the world are crowded (11). People live in big cities and much of our waste, especially waste (12) from factories, electric power stations, the chemical industry and heavy industry is (13) very dangerous. Fish die in the lakes, rivers, and seas; forest trees die too. Much of this dangerous (14) waste goes into the air and is carried by the wind (15) for great distances.