100字英语作文 If you have a time machine .what would u do?

If I have a time machine what would I do?
If I was able to travel in a time machine the first thing I would do is to travel into the future and see what it would look like, say, in 10 years time. In particular, I am into saving our planet. So I would like to see if we have done enough to reduce CO2 emissions. If we haven't done enough, with the help of a time machine, I would then be able to travel back to today's world and warn everyone about it.
The next difficult thing for me is to stop my temptation for changing "history" that had already happened. I really wouldn't want to rewrite the "history book".

A tiger is a kind of catamount animal. It looks like a cat, but much bigger than a cat. A tiger is very ferocious and it eats mainly meat. It has yellow and black streaks all over its body and it look...