Nice image
About "Global warming" or "climate change": the Earth is now on a warming cycle, aside of the human activity. The "little ice age" end about 1850 (http://en.wikipedia.org/wiki/Little_Ice_Age) and after this, the global temperature is increasing year by year. It's a natural cycle, and still we don't know the cause of those changes. One of the most possible causes are the altered ocean current flows. For example, the Gulf Stream increases the northwest Europe temperature, and if the direction of the GulfStream changes a new Ice Age will start on Europe.
Ariel said: Nice image About "Global warming" or "climate change": the Earth is now on a warming cycle, aside of the human activity. The "little ice age" end about 1850 (http://en.wikipedia.org/wiki/Little_Ice_Age) and after this, the global temperature is increasing year by year. It's a natural cycle, and still we don't know the cause of those changes. One of the most possible causes are the altered ocean current flows. For example, the Gulf Stream increases the northwest Europe temperature, and if the direction of the GulfStream changes a new Ice Age will start on Europe.
I have to go with Ariel on this one. So, in aswer to the question, yes the earth is warming. The cycle has been going on for eons.
Here's a little inevitability.