Cool stuff on this and the terrain conversations. Thanks!
I feel that I must draw on my real life here and warn everyone to get plenty of fresh air while working with any of these adhesives. I work with chemical companies on their environmental performance and I can say that A) they work hard not to find out the toxicity and ecotoxicity profile of the product and B) they are not very good at identifying what they do know. Despite that, the toxicity of most of the adhesives includes a risky mix of carcinogenicity (cancer), sterility and reproductive mutagens, and more.
No need to panic, just try not to use them for hours on end, keep the cap on whenever possible, and make sure the hobby work area gets plenty of fresh air.
(Who does use these adhesives, just with more caution and paranoia than most)