no
The word "looked" is a correctly used modifier in the sentence.
yes
The correct spelling is environment.An example sentence is "the environment should be looked after".
Here is an example: The boy looked at the broken toy. and with an frown on his face said, "Who did this?"
He looked ruefully at the broken vase, realizing it was a family heirloom.
looked
because it has to be
an example sentence would be : "I looked away in disgust, wishing i could erase the horrible memory."
When he looked at me I looked back.
The porthole is broken! A bird just flew right through the broken porthole! The glass on the floor came from that broken porthole.
She looked, but alas, it was not what she hoped for.
he looked blankly at me when i asked him the question