Fill in the gaps using one of the words in brackets: 1) The word environment … (is referred, refers, referring) to everything around us.
2) Environmental Science … (was becoming, became, has become) a key tool in our survival.
3) Environmental Science … (means, is meaning, has meant) learning to master ourselves.
4) The environmental crisis … (divides, can divide, can be divided).
5) The problems of depletion and pollution … (had worsen, can be worsen, will worsen).
6) Even renewable resources (are depleted, can be depleted, must be depleted).
7) In the USA excessive demand and poor land, management practices … (are destroying, are being destroyed, destroyed).