There's nothing like enhancing your facts to make a point. I believe the more accepted numbers are 15-20 years for methane and between 50 and 90 years for carbon dioxide although there is evidence that about half of atmospheric CO2 lasts less that 30 years.
That map is 5 years old. To get the it up to the beginning of this year you'd have to shrink the US 7%, shrink the EU 5%, and increase China 34% (This is from memory). The US and EU shrinkage is mostly due to the economic downturn and will go back up eventually.
There is no amount or type of evidence, even in principle, which would answer climate change alarmists. They will disavow the fundamental principles of science if that is what is necessary to protect their beliefs.
There fixed that for you.
Wow, a presentation from a corporation with a vested interest taken as fact without question (the second one from google docs).
I checked it out. It assumes it will work for 20 years with almost zero maintenance and one generator swap. This goes against observed fact which has large wind turbines having massive failures at between 1-2% per year. That's not a large number but these failures usually have to be rebuilt almost from scratch which increases the cost. It also doesn't include transmission costs. I'd guess their cost recovery estimates of 3-5 month payback should probably be doubled. It also does not count the cost of backup generation capacity for when the wind doesn't blow - note that capacity would be used full-time if the turbines didn't exist but the backup capacity has to be maintained even when not in active use.
The NW passage was not suitable for cruise ships in 1906. Besides none of the crossings via a temporary route say anything much about climate.
How do you know? The link you gave says they made the NW passage in 2006 only because of an icebreaker. It says almost nothing of the conditions in 1906. The second part of your statement is true although AGW advocates claim it does when it's happening "now."
second there is no such "surface data.org" web site
Also Mann's hockey stick (which was popularized by Gore) has been discredited. It's been shown that the algorithm he used will produce a hockey stick from almost any data because it preferentially selects/emphasizes the data that will create a hockey stick.