[Rafael Rothschild]

All the claims about human activities being responsible for Global Warming are only theories.

Everyone involved in a debate or discussion about GW, should learn about the ICE AGES, how are they produced and how it affects the climate in our planet.

AN INTERPLAY OF CELESTIAL EFFECTS
The first step toward the astronomical theory of the ice ages was taken 2,000 years ago, when the Grek astronomer Hipparchus discovered that the earth wobbles like a top as it whirls through space. By the end of the 19th Century, astronomers had described in detail three critical ways in which the earth's position in space and its orbit around the sun changes in response to the gravitational tugs of sun, moon and planets.
The first, Hipparchus' discovery, is called axial precesion. The second is tilt (an ever changinf angle between the earth axis and the plane of the planet's orbit around the sun. The third factor is the eccentricity, or varying shape, of the orbit itself, which ranges from nearly circular to a pronounced ellipse.
Between 1912 and 1941, mathematician Milutin Milankovitch performed exhaustive calculations to show how all of these factors (precesion, tilt and eccentricity) could cause changes in the intensity of summer sunshine extreme enough to explain the recurrence of ice ages. Extensive geological evidence discovered since Milankovitch's time confirms the impact of these celestial cycles on the earth's climate.

THE 100,000-YEAR STRETCH
The orbit of the earth gradually stretches from nearly circular to an elliptical shape and back again in a cycle of approximately 100,000 years. During the cycle, the distance between earth and sun varies by as much as 11 million miles.

THE 41,0000-YEAR TILT
The earth's axis is never perpendicular to the plane of its orbit; over the course of about 41,000 years the angle varies between 21.5 and 24.5 deegres. Because of the tilt, the solar radiation striking any point on earth fluctuates during the yearly orbit, producing seasons. When the tilt is greatest, summers are hotter, winter are coldest.

THE 22,000-YEAR WOBBLE
Even while the shape of its orbit and the tilt of its axis are changing, the earth wobbles slowly in space, its axis describing a circle once every 22,000 years. Because of this movement known as axial precesion, the distance between the earth and the sun in a given season slowly changes. Today, for instance, the shape of the orbit places the planet closest to the sun in the Northern Hemisphere's winter and farthest away in summer.

Ice ages could last thousands of years, while it is also possible to experience mini ice ages, lasting a few hundred.

We can add to the above reality, any theory we want, involving, tectonic plate movements, volcanic eruptions, human activities, etc, etc...but up to date they are just that: only theories.

We should pay attention to the natural violence of the universe, and its lack of romanticism to "freeze the image" as we would like it to be.

For those who claim the the oceans will raise a few feet en the next few years..... I have news for you: You better move inland, because it's been happening for millions of years.