8 of 10. Problematic test though. Among other things, it states theories as facts. For example, it presents the idea of regular cycles of warming and cooling based on astronomical regularities. The generally accepted theory is that these are not natural "cycles" but are the damping of oscillations left from the "nuclear winter" effect of the KT impact. (That's the one 65 million years back near the Yucatan that smacked down the dinosaurs). The "Little Ice Age" was the last dip and any such move towards cooler temperatures should be so small as to not be noticeable. Meaning there is, in fact, no future cooling effect to be expected that might counter a warming trend.
Aside from the obvious bias in the "test", it really begs the point of whether there is danger of human activity triggering a runaway greenhouse effect. It simply makes some points about scientific facts and then assumes common sense will bring you to a specific conclusion (at least, that's what I think the creator of the test expects). The problem with "common sense" is that it is seldom common and often does not make sense.
- Yoj
