GW is part of the continuing evolution of the Planet just as is the stupidity of the humans who throw those spanners into the gears that drive evolution.
Sorry Environmentalists but no matter how much you desire for evolution to stop, it won't !
Human activity or not !

Global warming garbage is for real. The timeline of past warming events were slower and caused by volcanic action loading co2 into the upper atmosphere. Now we have human made co2 being loading into the atmosphere at a more prolonged rate which will prolong the rate of climate heat elevation. The lag time is around 40 years if human made co2 is stopped now. A slowdown of co2 emissions will further advance the lag time. Take no notice of persons that say the earth needs carbon as nature controls the amount what the earth needs. It's the co2 in the upper atmosphere that controls earths hot house effect.

ALTRAV,

Please stop beating around the bush.

If you think there are other probable causes other than the burning of fossil fuels then please add it/them to the list I have started and provide a short explanation in a few lines.

Keep in mind we are not talking about global warming in general. We are talking specifically about the past 240 years.

So far the scoreboard reads:

Burning of fossil fuels: 1

Other probable causes that can be explained: 0

Should we draw the line here because it's looking like no one can come up with anything that can be supported outside of the burning of fossil fuels?

ALTRAV recites Denier hymn number... "The Climate's Changed before".

The only answer? DER! OF COURSE IT HAS!

Climate scientists study this all the time. Paleoclimate helps us establish the climate sensitivity to CO2 and is a bedrock to modern climate science. Rather than some mystery that climatologists have somehow accidentally overlooked, paleoclimate is one of the foundations!
http://www.ipcc.ch/site/assets/uploads/2018/02/WG1AR5_Chapter05_FINAL.pdf

As well as observation from physics and computer models the IPCC studies ancient climate to calibrate and test their computer models. Generally speaking, it works. There are a few uncertainties, but that's science and they are making advances all the time. Basically, asserting that "The climate has changed before!" as some sort of objection to climate science shows an incredible ignorance of the whole topic.
The earth's deep climate history is far from comforting. Super greenhouses have caused global Extinction Level Events.
http://en.wikipedia.org/wiki/Extinction_event#Global_warming

It took tens of millions of years for new species to evolve and recover after some of these super-greenhouse extinctions! While not yet as hot as some of these super greenhouses, it's going to be harder for ecosystems to adapt this time because it's warming 10 times faster than the ice-age cycle. Ecosystems don't have as much *time* to move. We also use about 40% of the land on earth to farm and herd our food, so ecosystems are hemmed in. It's not as *free* to move. We've put nature in solitary confinement, and turned up the heat. But the main risk is that our modern civilisation is utterly dependent on today's stable climate for our agricultural and grazing lands, which together cover almost HALF the planet. By mid century we could be losing a quarter of our crops on a regular basis. Links here. http://eclipsenow.wordpress.com/global-warming-is-serious/
In summary, previous super-greenhouses were catastrophic then and will be catastrophic again unless we stop burning fossil fuels. http://skepticalscience.com/humans_survived_previous_changes.html

The climate has changed before, and none of those variables are at work now. It's us, and it's bad news!

'So far the scoreboard reads:

Burning of fossil fuels: 1'

Well Mr Opinion, if that is true get off your computer and go to the Indian and Chinese Embassies and hold up your silly little signs. If you are not willing to do that you should just shut up and stop making a fool of yourself.