I guess victory at Agincourt papered over England's failure to adopt controls on greenhouse gases, because a new study says "Middle Ages were warmer than today."
"[Global Warming] claims have now been sharply contradicted by the most comprehensive study yet of global temperature over the past 1,000 years. A review of more than 240 scientific studies has shown that today's temperatures are neither the warmest over the past millennium, nor are they producing the most extreme weather - in stark contrast to the claims of the environmentalists."
Thanks to Andrew Sullivan!