Not to mention the fact that ok, I know there were some data manipulation, but so what... this is definitely not the case of all these studies, you will unfortunately always have people who do sloppy work, change data to "suit" their needs etc. But that doesnt mean all these studies are wrong.
There is no reason why all the studies should be biased. Yes there are of course people/organizations for whom it might be beneficial if global warming was proven or supported by a study, however! There are also countless companies/people for whom quite the opposite is advantageous and they will do everything they can to have studies that deny global warming.
The conclusion therefore is that you will have both good and bad studies for both sides and so you can look at them equally. And when you do so, you will find that the number of studies supporting global warming by far outnumbers the ones that deny it.
And I want to emphasize one thing again and Ive said it here countless times already. I am NOT saying humans are responsible for global warming. I am always just saying that we dont know. Thats the problem. We dont know. This means that I disagree with those who simply say - no. What I therefore want is have people studying this and most importantly - take preventive measures because since we dont know one of the possibilities is obviously that it is so and in such case, if we dont do anything now, it might be too late.
This is the exact same principle as insurance. You pay insurance because you dont know whats gonna happen. And maybe nothing will happen, in which case good for you and I guess you wont regret spending the money for the insurance. And in case something does happen, you will be grateful for deciding to pay for it. Or think of making backups. It takes you time, it might cost you some money to do it, but you still do it, simply because you dont know if something is going to happen to your HDD and you want to make sure you are ok if there is a problem. It might then later turn out that you never needed the backup, but you probably wont regret it either and you wont regret the money/time invested to make the backup. You have to look at global warming as not a fact, but a possibility. The undeniable truth is that we currently dont know. No-one knows for sure because it is so complicated. Thats why I disagree with saying - we dont have a problem, we dont need to do anything, lets just ignore this. No, the fact is we MIGHT have a problem and therefore we have to act in such a way that in case it turns out we do, the consequences are as little as possible.