The other day I read that global warming was causing the destruction of pine forests because pine beetles are not being killed back in the winter. It is curious that such a small worldwide change in average temperature of about 0.6 F over the last 50 years would affect pine beetles that much. It is even more curious considering that the Southwestern United States where most of the pine trees are located has actually seen a decline in average temperature. It seems that these days every bad thing that happens is caused by George Bush or global warming. I'll posit Williams's Law: every adverse effect in climate or food production or species endangerment is the result of global warming.