[ClearCase_guy]

The Little Ice Age ran from about 1600 to 1850. Since the mid 1800's we've been coming out of an unusually cold period. (That means the global temerature has been rising, in case you need help.) Global temperatures are not yet at the level they were 1000 years ago when the Vikings had farms in Greenland (a period known as the Medieval Maximum).

Please explain for the class how the Vikings made the world warm, how the Pilgrim caused things to get cold, and how Abe Lincoln managed to heat things up again.

It's a natural cycle.

[cogitator]

It's a natural cycle.

All of the effects that you mention have been evaluated. The current warming trend is being augmented by the increasing concentration of CO2 in the atmosphere. Natural variability cannot account for all of the observed warming.

I can back up all of these statements with references to scientific literature, if you would be willing to consider what they say. From long experience, I know that this effort is usually fruitless for someone who already has their mind made up. Tell me if you're actually interested -- I won't waste my time or yours if you aren't.