Uncertainty over whether global warming is the cause.

This article is about how scientists had seen a decline in certain species of frogs, but they did not know the cause of it, so when they heard about global warming they said that that was the cause. Later, now they say that a certain bacteria that thrives in those types of conditions was the cause. Lately scientist have not outright said that global warming is the direct cause of all this. I think that they need to research more before they make a decision.
http://www.nytimes.com/2008/03/25/science/25frog.html?_r=1&ref=science&oref=slogin