SHELL OIL is predicting a worldwide temperature rise of 4 degrees Celsius in the next 40 years. That's an oil company. And figures on global warming don't properly take into account the possible release of methane from the arctic ocean when that ocean heats up. Yes, scientists make mistakes sometimes, and those mistakes can go in all sorts of directions. Global warming could also be worse than 4 degrees C.
Even if what I predict, and a lot of climate scientists are predicting (including apparently climate scientists who work for oil companies!) doesn't come to pass, I have no regrets in recommending that the average (non-science) person doesn't go to college. In the US at least, it's an enormous burden of debt to take on, and in most cases it is unnecessary. I have a college degree, and I am pretty certain my plumber makes far more than I ever did. Global warming aside, the rate of ecosystem destruction that is currently going on is unacceptable. It is unacceptable both morally and in terms of the future viability of the ecosphere. What I would recommend to the average non-science-major is that they skip college, work hard at a trade until they have enough money, and then either buy land and go into organic agriculture or else join an ecovillage like Dancing Rabbit where people are working on living in a sustainable and environmentally-friendly manner. Living in a manner that is both sustainable as to resources and also allows room for other animals and plants to exist is the only hope of the planet. I could tell you horror stories about what is done to the vast majority of the arable land in this country as far as decreasing biodiversity goes, but I will leave it there.
As I said in the video, if you want to be a scientist or engineer or chemist or something of that sort, go to college. That's about all that anyone ever needs to go to college for.
I found this an interesting link on the topic of what studying climate change does to the well-being of some of the scientists doing it: http://www.esquire.com/news-politics/a36228/ballad-of-the-sad-climatologists-0815/