As a matter of fact, it's not related directly with welding.
BUT, having put this question on the Forum it's the only mean I have to know the opinion of the average American citizen. Here in Sao Paulo I can buy TIME magazine and the New York Times newspaper, but apart from being expensive, do they actually reflect the opinion of the average American citizen? Do they? I don't know.

I said it's not related DIRECTLY with welding, but good chances are it's related to environmental pollution, and all of us, inhabitants of mother Earth are (or at least should be) concerned with pollution, including welding engineers, technicians, certified inspectors and welders. The welding shop (or laboratory, as the university officials like to call it) at Mackenzie University has been provided with every mean to prevent atmospheric pollution and care of the students health. If welding is carried out with no care to the environment, it'll have contributed, even in a sub-microscopic way, to the New York disaster.  

Giovanni S. Crisi 

PS. My correct name is Giovanni, i.e., John, in English.

How is the South Atlantic Anomaly treating you these days Giovanni?  What does a magnetic compass point to in San Paulo right now? It has grown a great deal in the last few years...I wonder if the theorists are correct about the poles flipping....there is good geological evidence for it.

Is there any money for us to make out of this mess?

It's Cyclical alright! About every 50 give or take a few years, the weather cycles change and then repeats itself... Global Warming is happening but, It's not yet affecting the weather as some think although, there is empirical evidence that there is a slight correlation between the two.
It really depends form which perspective your looking from.

Respectfully,
Henry

What you have just stated has more to do with the problem than most give it credit for. Co2 is not the enemy here, most forms of plant need it to survive. The plants convert C02 into oxygen via photosynthesis. Where there is insufficient plant life to convert the Co2 to oxygen, you will have an excess level of Co2 by default. Wholesale deforestation will create such a condition. The earth has lived through eons of massive volcanic activity spewing a variety of gases into the atmosphere, which is scrubbed out of it over time by settling, and taking it into the plant life. We know this from cores drilled all over the world.

The base problem with global climate change 'science', is that A) it's highly politized, B) through that politizing, any data that doesn't match their models is summarily thrown out. Actual science does not throw data out simply because it doesn't meet the expected criteria. In this particular case, it was discovered that the earth has been void of glaciers in it's past, that there were in fact cycles to this, and that carbon14 dating was not the only path forward for radiodating.
For instance, beryllium10 Be10, is created by cosmic/proton spallation of oxygen atoms in the upper atmosphere. We also now know that there is an inverse relationship between solar activity, and the levels of Be10 that are found in cores. During long periods of solar minimum, there is a distinct increase in the Be10 levels. Cores from the Maunder solar minimum show large increases. This btw was also the same time period of the mini ice age. circa 1645-1750.
What was lacking during that time, was evidence of other solar activity (flares, CME's etc). What this tells us is that there were strong proton events/solar winds during those times of solar minimum.

A prime example of the maunder minimum effects is in stradivarius instruments from 1680 through 1700. No one has been able to reproduce them. Further examination shows the tree rings are closer than any current wood available. During that minimum, there was an extensive low in the solar minimum, an increase in Be10 production, which btw, shows up in microscopic form in those instruments. They cannot be reproduced due to the density of those rings, as the trees of the time were experiencing extensive periods of cold weather preventing normal growth.

This solar activity has been measured and proven to be of a cyclic nature. The Co2 is therefore not a direct cause, but an indicator. The increase of Co2 during that time is more indicative of slow plant growth. That includes algea plants.

The global cooling created by the low solar activity, and the change in Co2/Be10 levels would have a direct impact on the thermalhaline currents of the oceans.
Therein is the tie back to the ocean currents.