2 Circle the correct form. 1 A lot of rivers pollute/are polluted by acid rain. 2 Pollution gathers/is gathered in clouds. 3 This factory pollutes/is polluted the atmosphere. 4 Acid rain causes/is caused by toxic fumes that factories emit. 5 Rubbish can recycle/be recycled. 6 Volunteers collect/are collected rubbish in the parks. 7 Nesting boxes have built/have been built by volunteers. 8 Many species have endangered/have been endangered by pollution recently.

2. Circle the correct form:

1. A lot of rivers are polluted by acid rain. (Пассивный залог, реки страдают от загрязнения).
2. Pollution gathers in clouds. (Активный залог, загрязнение собирается).
3. This factory pollutes the atmosphere. (Активный залог, фабрика загрязняет).
4. Acid rain is caused by toxic fumes that factories emit. (Пассивный залог, кислотный дождь является следствием).
5. Rubbish can be recycled. (Пассивный залог, мусор может быть переработан).
6. Volunteers collect rubbish in the parks. (Активный залог, волонтеры собирают).
7. Nesting boxes have been built by volunteers. (Пассивный залог, скворечники построены волонтерами).
8. Many species have been endangered by pollution recently. (Пассивный залог, виды стали endangered из-за загрязнения).