Global warming has apparently started claiming its first victims. Poison frogs in S America and plankton are bearing the brunt of our follies. The real threat comes from the reduction in plankton quantities, as it can seriously disturb the food chain in the oceans.
If one can learn a lesson from these two incidents, it is this. Global warming would not only threaten our food security, it would also lead to widespread epidemics. Disease spreading organisms can travel far more when the temperatures are conducive (that is, warmer). This is what is killing those beautiful poison frogs (described by one researcher as tropical easter eggs). I suggest people read "Guns, Germs and Steel" to fully understand the repercussions of seemingly innocuous environmental changes.
