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