Viết lại các cảu sau sao cho nghĩa không đổi

1 you ảe interested in protecting environent. He is delighted.
He is.......
2 they could save some money from reused things . They are very happy
they are.......
3 my slass won the first prize in collecting cans. We are worrited
4 the Y&Y is having a plan on  recycling used paper l am very glad
l am