9 класс

The smoky clouds ... in the west and the red sun went down behind them.

It looks like we ... for treating nature so carelessly.

How weather and smog makes me ... .

The planet Earth is only a tiny part of the ... , but it is the only place where human beings can live.

If this trend ... , one day we won.t have enough oxygen to breathe.

The Mediterranean is already nearly dead, the North Sea is ... .

Another problem is growth of ... .

If the temperature continues growing up the snow on the mountains and ice will melt, so the most of the earth ... under water.

Environment is the place ... we live.

Since ancient time nature has served man, being the source ... his life.