Disposed oil and many other items can be reused to（） A: make new materials B: preserve wetland and animals C: have clean air D: have clean water E: collect cigarette butte F: collect despoiled oil

Ryan，with the help of others，is fulfilling his dream of help African people to（） A: make new materials B: preserve wetland and animals C: have clean air D: have clean water E: collect cigarette butte F: collect despoiled oil