"我认为我们在保护环境不受污染(pollution)方面还做得不够."这句话翻译成英语是什么

I think that what we have done so far in environmental protection isn't enough.
I thought that we are not polluted in the protection environment the aspect also to do insufficiently.
I think we are not polluted environment protection is doing enough.
we have more things to improve on protecting environment to be unpolluted.
I don't think we have done much enough to protect the environment from pollution.
说法太多了,

直译：I think we have not done enough in protecting environment from pollution.
意译：In my point of view, we haven't achieved much in environment protection.

I think what we have done in protecting environment from pollution isn't enough.

I think we can do better to prevent our enviornment from being polluted.