¿Cómo podría explicar esto en inglés: global warming?
for example:
for opinions: I think that, I belive that..the global warming is a complicated problem because ..... I suposse that the scientisf
well I don´t know

Question

¿Cómo podría explicar esto en inglés: global warming?
for example:
for opinions: I think that, I belive that..the global warming is a complicated problem because ..... I suposse that the scientisf 
well I don´t know

Answer

If you are trying to explain global warming, you don't want to use opinions (what you think or what you believe). If that's the real questions, then you should try to define the phrase "global warming." I found a link that does a good job of explaining global warming. Maybe you could read it and understand it better!

http://www.livescience.com/topics/global-warming/

Answer

Hello Mar:

A simple internet search   might be the answer. If you do that , you can find something like this:

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"500 scientists refute global warming dangers"

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A simple web search will lead you to the article at WND dot  etc.

--Warm Regards,  Bruce