1)eco-helpers collect rubbish in parks and forests for 2)recycling it out of town. They also 3)clean out ponds and rivers. Instructors provide 4)volunteers with a lot of useful information. Young eco-helpers read books about 5)the cycle of life and learn about 6)ecology.
1)eco-helpers
2)recycling
3)clean out
4)volunteers
5)the cycle of life
6)ecology