Most people ignore the nearly 200 years of increased COOLING the earth had from about 1500-1800 or so.(The Little Ice Age)
Before this, you could effectively grow WINE in places like Great Britain and even close to the Scottish Border.(Recorded accounts, as well as verifiable hard evidence)
So if anything, we're actually moving SLOWLY back to the point we were supposed to be at some 500 years ago.
So what HAS been confirmed: Gradual Increase in temperature of Earth. Proven to have happened MORE THAN ONCE in the History of the Earth.
What hasn't been confirmed: Whether Humans have been a major cause of the environmental shift.
If anyone actually does their research, you'd see that most of what has been said is actually false outside of general temperature increases, and even then, those are sometimes fudged by people with agendas. In the end, this is nothing more than a way to force "First World Countries" into a forced state of acting, while they ignore most developing countries, who in fact would be the largest contributors rather than the developed countries.(Though developed countries tend to eat far more resources than developing countries do, in general)