I understand your frustration with casual misuse and misclassification of data. From my perspective, a "fact" is something that is empirically true whether the fact is observed and widely acknowledged or not. If something exists, it is a fact that it exists, whether anyone knows about it or not. Stating that their existence is not fact, does not make them cease to exist.
You bring up a good point with global warming and I completely agree with you on this subject. Two months ago, NASA released a decade of satellite data that shows the models used to support global warming projections are wildly inaccurate. But the models have been broadly accepted, so contradictory data is not welcome.
Most public information regarding the Greenhouse Effect focuses only on carbon dioxide, methane, and chloroflourocarbons. Each of these compounds captures and holds a certain amount of radiant energy (contributes to the Greenhouse effect). About 5% of these compunds are anthropogenic, or man-made, an amount considered significant.
The public information, however, omits the contribution of water vapor to the Greenhouse Effect. Water vapor has a broader absorption spectrum than carbon dioxide and water molecules have a higher heat capacity than carbon dioxide. This means that water vapor is much more efficient at capturing and holding heat in our atmosphere. There is also vastly more water vapor in the atmosphere than carbon dioxide. This planet is approximately two thirds ocean, so there's a lot of exposed water to evaporate. More importantly, the amount of water vapor in the atmosphere is only 0.001% anthropogenic. The human contribution is insignificant. When you include the contribution of water vapor in the total Greenhouse Effect, the total amount of Greenhouse gasses that can be attributed to humans drops to about a quarter of a percent. This means that if mankind and everything mankind does to contribute to the Greenhouse Effect ceased to exist, 99.7% of the effect would persist.
Some point to the rise of carbon dioxide concentration in our atmosphere over the years and insist that this is evidence that mankind's contribution is increasing. The fail to take into account, however, that seawater contains carbonate ions(dissolved carbon dioxide) and that when seawater evaporates a certain amount of the dissolved carbon dioxide is re-emitted to the atmosphere. This effect accounts for the increase in atmospheric carbon dioxide.
But this information is omitted from EPA publications, therefore it is not publicly understood as fact.
Whether or not this is "known", however, the increase in carbon dioxide is good for trees and what's good for trees is good for bigfoot. Just don't blame man for doing anything that is good for bigfoot.