Whoa... you can't just dismiss the study that Kestas put out just because of the title. If you read the mandate of the ipcc on their website I would say that they have little political agenda, rather they serve to educate the politicians.
"IPCC reports should be neutral with respect to policy, although they need to deal objectively with policy relevant scientific, technical and socio economic factors. They should be of high scientific and technical standards, and aim to reflect a range of views, expertise and wide geographical coverage."
Regarding your second point, a drop of temperature in one year is hardly evidence that disproves warming. It is an average temperature increase over much longer periods than a year. It has been said that increasing temperatures will cause a larger fluctuation in temperatures though on average they will increase. So it is no surprise that certain years will be colder. You can't look at a single year and use it to disprove a warming movement on a much higher order. You are contradicting yourself here. You admit that there is a warming effect, but that it is not man-made. But then you go one to argue that there is no warming effect. Yes climate changes, but we're talking about large scale shifts here, not on a year by year basis. There is an obvious trend in global temperatures on the geological scale. But the study that Kestas linked shows that the temperature increases we are seeing are highly uncharacteristic of the normal temperature fluctuations since we are currently in a glacial age, and temperatures were expected to fall on average. Look at any of the temperature graphs in the study, you'll find that there is huge variation year by year, but the average trend is to global warming.
As to your argument of sensors, I have no way of knowing really if the study used faulty sensors or not, but considering it's objective mandate set out by UN agencies I would be very surprised if they were deliberately attempting to deceive us. Regardless, if the sensors are stationary over many decades then the average increase in temperature is enough to justify global warming, it is not the mere difference in air conditioning to black asphalt. It is a trend over the course of decades.
When I said Day After Tomorrow scenario I was referring to the altered salinity in the Atlantic Ocean currents bringing about a severe ice age. I wasn't referring to apocalyptic conditions. The effects I listed may seem drastic, but they will only compound our world's current problems. The world as it is now is pretty screwed up anyways. There's a desperate clean water shortage in most of Africa, and it will only get worse with global warming. It doesn't suggest the civilized world will end or that it will introduce hugely novel problems, it is mostly an increase of familiar problems.
Your live pictures of the Arctic are no proof either. I don't think the naked eye can discern the difference between multiple winter ice build-up and so called single winter freezing. I don't put that much stock into the original article posted, and it's doesn't necessarily mean death and destruction either, except for the local fauna. Although it might exacerbate the growing battle for Arctic resources.
It's weird that you agree that there is global warming, but say that it's not man-made, but half of your arguments deny global warming outright. I'm sure that the environmentalism movement has a political agenda, but that does not stop it from being true. If the real money is anywhere it's in the continued use of fossil fuels. I wouldn't be surprised if environmentalism was being bent for nefarious purposes, but it wouldn't have been invented for such purposes when a perfectly good moneymaker lies in fossil fuels.
For your second post...
Obviously there are other contributors to greenhouse gas emissions, but if you look at Kestas' study, the vast majority are caused by humanity. It is not simply bad luck that all of a sudden all these greenhouse gases are present in the atmosphere. Before the industrial revolution this was not the case. It's not a coincidence.
Kestas' study takes into account solar and volcanic activity, as I quoted earlier "During the past 50 years, the sum of solar and volcanic forcings would likely have produced cooling".
As for the immense CO2 reserves in the ocean, this is definitely a major contributor, because as temperatures increase, the solubility of CO2 in the oceans decreases. The oceans are by far the largest reserves of CO2 and this causes a positive feedback effect. But if it were not for man made emissions this would not be a problem, as temperatures would on average decrease as we happen to be in a mini ice age in the grand scheme of global warming and cooling cycles.
In the age of the dinosaur, plant life was quite different from the plant life we have now, and was surely better suited to a more CO2 saturated atmosphere. Modern day plants are not necessarily as well equipped to deal with higher concentrations of CO2 in the atmosphere, though I suppose they will adjust if the emissions are gradual enough. But are they? The study suggests that the rate of emissions will continue to grow through to 2030 and beyond even with the mitigation measures being taken as fossil fuels will continue to be the main source of energy in the world. If the planet warms too quickly for the global flora we'll see rainforests converted to savannahs, and savannahs converted to deserts, ntoa luxuriantly fertile planet, according to the study. As well, ocean acidity increases, damaging coral reefs. Besides it's ridiculous to justify the burning of fossil fuels by saying that the CO2 emitted actually helps plants, when the industrial wastes of burning and refining fossil fuels creates vast amounts of pollution that cause so much damage to the global flora.
Besides, CO2 can only help plants to a certain point. They are limited by the resource that is the least abundant. Basic high school biology teaches this. Excess CO2 isn't used to stimulate the growth of plants, if the plants don't have enough water or other nutrients to grow. Did I mention water shortages caused by global warming? Do you think plants will care about all the CO2 floating around when they can't get water?
CO2 is not a demon, it's just that we have too much of it. Everything in moderation... If you have too much of anything it's bad...