1. The importance of the environment is being told the children by ecologist .
2. The amount of electricity was reduced last month​ by them .
3. This wonderful waterfall is always admired by holidaymakers .
4. An article about the thriving wildlife of the UK will be written by journalist .

1 The children are being told by the ecologist about the importance of the environment.
2 The amount of electricity was reduced last month.(by them) - необязательно
3 This wonderful waterfall is always admired by holidaymakers.
4 An article about the thriving wildlife in the UK will be written by the joornaist.
5 The habitats of many animals are being destroyed by acid rains.