Discussion of real facts on Global Warming is very challenging in as much as various controversies and protestations surround the study of global warming itself.

Although there is an agreement that the global temperature has increased in the past two centuries, the causes of this continuous temperature increase are still being debated by scientists. In fact, science does not have a uniform perspective regarding this environmental issue. Although the United Nations organized the Intergovernmental Panel on Climate Change, a worldwide agency that conducted researches and studies on Global Warming, many scientists and scientific institutions are still in doubt whether global warming are a product of human activities or simply a natural, irreversible phenomenon.

Facts

Painstakingly measuring the changes of a planet as huge and as enormous as the Earth is such a feat. Although concentration of greenhouse gases is quite easy in the laboratory, this is difficult when the whole world is supposed to be The Laboratory. And so calculations, figures, and tests of scientists differ and sometimes in conflict with one another, utilizing various kinds of factors, values, instruments and methods.

Predictions on the future estimates of global greenhouse gases concentration and temperature increase also vary from one scientific institution report to the other, as there is a conflict between forecasts made through direct, evidence-based observations and hi-tech, computer calculations.

And so while the information and the facts that these projects churn out are relevant to the study of global warming, considering what is factual and what is not itself is problematic inasmuch as the production of knowledge of scientific institutions and organizations is still filled with doubtful and unresolved
egments.