Choosing topic for my dissertation

Though it is half a year away, but I should make more preparation. Besides, this may help my application.

Now there are three options.

1. Find a local conservation group and see what I can do for them.

2. Join Operation Wallacea's expedition, to remote countries and get data, then finish my dissertation. Some fund raising is necessary.

3. Work with UKCIP, it is related to climate change and could help my application and further study.

I am seeking information on them. But I have to be fast if I am really going to work on climate change.