Out of curiostiy, if we had a medication put out into the pharmaceutical market by one of the big pharma companies, and 70% of the people who took that medication died, and all died of the same type of heart failure, should we also wait until we know for certain that they all didn't die from eating spinach, or from having too much sex, or from wearing purple shirts before we remove that medication from the market?
Come on. Why are we supposed to accept such a double standard when it comes to human impact on Earth's climate? This is completely assinine.
Should we be cautious and intelligent in our reaction? Of course, but how the hell are you defining caution if you're advocating the status quo (which interestingly seems predominated by ignorance and logical fallacy)?