Listen to the text about people's influence on the environment. Choose the correct answer.
The damaged environment
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1) Some chemicals, foreign to the planet and its life forms, have been deliberately used to:

2) An ecosystem might be completely disrupted if one key species is:

3) It will probably take a thousand years to establish:

Lai risinātu uzdevumus, lūdzu reģistrējies!

Ātra reģistrācija: