I'm going to ask a question here . Expert's say we are doomed due to climate change. But could they be wrong. Last year's summer only just eclipsed 1976 , and was still 3 degree's cooler than the UK record in 2003. And it's not like they have been wrong before. In the eighties they said we would all die of aids , then it was die from eating eggs and then they said diesel was less pollutant than petrol. Just a thought.
Well firstly, as Yorkie has pointed out,
doomed is a massive exaggeration on what the experts have generally said about all those things.
Also, as far as I can recall, I don't think 'expert' opinion has ever been that diesel was less of a pollutant than petrol. Expert opinion was that diesel cars were more efficient than petrol cars in terms of CO2 emissions/mile travelled. That was completely correct. The Government of the day then made a value judgement that that lower CO2 was more important than the higher particulate levels from diesels. The Government's value judgement has changed in that regard and today probably most of us regard the higher particulates as much more important (partly because of more evidence of just how harmful they are).
Similarly, expert opinion was never that we would all die of AIDS. So if you're going to quote 'expert opinion' you need to be sure that what you're quoting really is expert opinion.
In the case of climate change, yes, there is a theoretical
possibility that 'expert opinion' might be wrong - but that's only because in science there's always a theoretical possibility that you might be wrong. Science almost never deals in 100% absolutes. But for the question of man-made climate change being real, that possibility is so tiny that it's pretty safe to say for all practical purposes it's zero. There are still many arguments about the precise extent of climate change and the finer details of how it will impact us, but there is no reasonable doubt that it is real, caused mainly by CO2 emissions, and going to have a serious affect on the World. The weight of evidence backing that up is now huge, the research has been ongoing for decades, and the number of scientists involved is similarly large. Look at some of the links I posted earlier.
Look at those and notice how definite the language in most of them is, and remember that these are respected well established scientific organisations. I used to work as a researcher, so I know from experience that scientists are generally very ready to emphasize any significant doubts in their research conclusions. Most scientists do not use definite language unless they feel very certain of their findings.