I need help writing my thesis statement for an argumentative essay I'm writing about how its not to late to save the oceans. I want to argue that humans are the cause of the dying oceans and I also want to argue that there are many ways to help save the ocean but im having a hard time making a thesis statement out of it.

So far, I don't see anything you've written that is arguable. Who would disagree with you about what you wrote above?

Read about thesis statements here:
www.stcloudstate.edu/writeplace/_files/documents/writing%20process/thesis-statement.pdf

And here:
powa.org > Convince > www.powa.org/convince/stating-your-proposition.html