1. people all over the world think about our planet. 2. they say our planet is in danger. 3. in many rivers and lakes the water is very dirty. 4. even fish die in such water. 5. the way people live has changed the climate on our planet. 6. in the north of europe the climate has become milder and warmer too. 7. many animals and plants lose their homes. сделайте из каждого предложения общий вопрос. )