Ana, you can start by looking at history.Hy i need more informatio about this..can someone explainme please?thanks!
Look up "Medieval Warm Period" 900 to about 1300, then the following years of "The little Ice Age".
The MWP is when Greenland was settled.. It was Green !!!
They even were able to farm it.
The little ice age followed and froze the Thames River.
Legitimate climatologist attribute climate change to NATURAL factors, mainly the actions of the SUN.
Unusual lack of sunspots are considered a key to warming of our solar system, including Earth and Mars.
Do not let the scam artist influence you. They are only after their own interest, ranging from money, to Marxist control of us.
Gore is in it for the money.