The Time Traveller

I will hear everyday a man goes pass door way and makes a clock noise and disrepair when I get out see who went pass It was foggy day I could barely see anything he went by then it was a man then he stared to run and I saw a clock on his back then as soon as catch up to him he disrepair in to fin air and all I found left were bolts that were on the floor.So I tyred to make a clock and trick him with the I made so I waited until he came.I stared to hear leaves and tiny rock collide in to each other then they all fell down and the man came and put his clock down and switch it with a normal clock.he came back got grab the fake clock and tyred to disperser but it didn't work so I came ask some questions.Then he ask what happen to this place bad stuff happen like polluting,globe warming and more stuff that happen
so please.If you could, would you go back and change time? Make a difference to our environment?Sure then I gave him his real clock just change the environment I went to sleep and then I look outside and all of the fog is gone and flowers on people back yard and the man came and ring door bell and I did what you ask