no it got better
yes
Gotten is the past participle of got.
No, but Has Gotten is.
Is this question from a questionnaire that you have? I'm not sure anyone can answer it for you in that case. Or are you asking this question to the general public? In that case there will be many different answers. In my case, the answer is unclear. In many ways my life has gotten better, and in many ways it has gotten worse. Focusing on the "worse" too much really has no point to it other than to teach a lesson or remind me what I can change. For example, I've gained weight and gotten out of shape over the last 10 years, so thinking about this reminds me to make a plan to lose that weight and get in better shape.
Worse is rarely used as a verb. When it is, the past and past participle is worsed.
The past participle of "get" is "got" in British English and "gotten" in American English.
Pollution doesn't have a past tense as it's a noun.
Gotten is the past participle of got. The present participle is getting.
"Has gotten" is the present perfect tense of get.
Yes, but thanks to extensive genetic engioneering they have gotten much larger in the past 30 years
"Worse" is an adjective and so doesn't have a past tense.
Gotten?
The past participle is gotten.