Well, it's a huge subject and no one knows the answers even the very elite scientists. So any opinions on this forum are likely to be pure speculation, opinion and utter blox. 
However, these are the facts as I see them.
Green house gasses do cause global warming and man produces greenhouse gasses, but because the earth is warming naturally after an ice age, no one knows what effect man has.
Natural events like volcanic eruptions or rotting tundra becoming unfrozen can cause massive amounts of greenhouse gasses. Add into that, sunspots and all host of chaotic forces and who knows what effect nature has (nature wiped out the dinasours quite easily afterall)?
On the other side of the coin - Western countries had the industrial revolution and polluted and prospered, is it fair to look down our nose's at larger developing countries whose economies are growing (and who up till now have lead very non-polluting lives) and dictate to them? 
India and China have a bigger populous than Europe and America. Maybe it is them that should live in Shangrila and we should be part of that world that is "unfair, unequal, and very hard for the majority of people".
Ho hum, makes you think.