English does not have a future tense. Instead it uses other ways to talk about future time, one of which is the idiomatic "be going".
"Am" is a present tense auxiliary verb and hence the verb phrase "am going" is present tense, though it serves to locate the situation in the clause that follows it as being in future time:
I am going [to clean the environment].
Incidentally, the question you quoted is nonsense. Where did you find it?