请大家，帮看看我写的句子对不对

　　请大家，帮看看我写的句子对不对。Hence, the present catalyst can be employed as an effcientenvironmentally benign catalyst, as well as economic aspects of ...production by using cheap clay as catalyst.
===有问必答===
"...effcientenvironmentally benign..."不大对吧？---仅供参考