Translate the following sentence into English.
回收利用旧瓶子比生产新瓶子费用更高，但是为了环保，这样做是值得的。
【正确答案】：
IT'S MORE EXPENSIVE TO RECYCLE USED BOTTLES THAN TO MAKE NEW ONES. BUT IT'S WORTHWHILE FOR THE PROTECTION OF THE ENVIRONMENT.
【题目解析】：
考点：考察了比较级结构It's more adj. to do than to do和...是值得的it is worthwhile...；回收recycle；环保the protection of the environment。