Then again, it's easier for Rush to spout without learning the facts on this one.
From the summary word for word, this is the FIRST paragraph under SCIENCE:
"Green house gasses are accumulating in Earth's atmosphere as a result of human activity, causing global mean surface temperature and subsurface ocean temperature to rise.While the changes over the last several decades are likely due mostly to human activities, we cannot rule out that a significant part is also a reflection of natural variability"
Reducing the wide range of uncertainty inherint in current model predictions will require major advances in understanding and modeling of the factors that determine the sensitivity of the climate system. Specifcally this will involve reducing uncertainty regarding:
-the future use of fossil fuels and futre emissions of methane.
-the fraction of the future fossil fuel carbon that will remain in the atmosphere and provide radiative forcing versus exchange with the oceans or net exchange with the land biosphere.
-the feedbacks in the climate system that determine both the magnitude of the change and the rate of energy uptake by the oceans.
-the impacts of climate change on regional and local levels.
-the nature and the causes of the natural variability of climate and its interactions with forced changes, and
-the direct and indirect effects of changing distributions of aerosols.
Knowledge of the climate system and of projections about the future climate is derived from fundamental physics, chemistry and observations. Data are then incorporated into global circulation models. However,model predictions are limited by the paucity of data available to evaluate the ability of coupled models to simulate important aspects of climate. To overcome these limitations,it is essential to ensure the existence of a longterm observing system and to make more comprehensive regional measurements of greeenhouse gasses.
Evidence is also emerging that black carbon contains aerosols ,(soot) which are formed by incomplete combustion, may be a significant contributor to global warming, although their relative importance is difficult to quantify at this point. These aerosols have significant negative health impacts,particularity in developing countries.
While current analyses are unable to predict with confidence the timing, magnitude, or regional distribution of climate change,the best scientific information indicates that if greeenhouse concentrations continue to increase, changes are likely to occur. The U.S. National Resarch Council has cautioned, however, that "because there is considerable uncertainty in current understanding of how the climate system varies naturally and reaacts to emissions of greenhouse gases and aerosols, current estimates of the magnitude of future warnings should be regarded as tentative and subject to future adjustments(either upwards or downwards)." Moreover, there is perhaps even greater uncertainty the social, environmental, and economic consequences of changes in climate.
Get the facts Rush. And stop relying on Drudge.