Need help creating a Thesis for research essay regarding global warming.

Hello!
I'm having a hard time creating a thesis for a topic. For my assignment, we are allowed to pick any topic to do our research essay on.

I was wondering if it is okay to make my topic "Is global warming a serious environmental issue that negatively affects life on Earth?" considering that in my essay, I wanted to talk about how global warming affects the environment, our health, and the economy. I would like to integrate the issue of greenhouse gases and how people emit them because it is a large factor that is responsible for Global Warming... however i'm not sure how to alter my topic in order to be able to discuss all of this. I also need help coming up with a thesis too.

or..
I was considering the topic "is global warming man-made" however I wasn't sure how to create at thesis for this. My idea for a thesis was to say that human activities such as burning of fossil fuels, agriculture, and industrial practices contribute to global warming

In short, I would like to talk about the negative effects of global warming, but also the causes of global warming as well, in my research paper... but I am having issues coming up with a topic & thesis statement that can help me cover all of this and get started.

Any help is greatly appreciated..

-Confused student. ):

Additionally, I have done most of my research for this essay.
Coming up with a thesis statement that can help me get started is proving to be difficult for me, as I have lots of info but don't know how to put it all down into a statement.. & THREE POINT thesis..

... :c

Something that I use to create a solid thesis is this site: corptrain.phoenix.edu/thesis_generator/thesis_generator.html In all honesty, I would help you create a thesis but this site simply gets the job done. Enter whatever information you currently have and the arguments you want to make and it will (to the best of it;s ability) create a solid thesis. If you don't like what it creates for you then you can merely use ideas from it and or parts of it to branch off of. Let me know how it works out by posting the thesis it creates here and then I can help you edit that one. - Matt