The atmospheric CO2 concentration is rising - mainly due…

There is still zero empirical evidence that anthropogenic production of CO2 is making any measurable contribution to the world's present warming trend.

— Alexander Cockburn

What we are saying is that on top of the warming trend there is a long-periodic oscillation that will probably lead to a lower…

— Mojib Latif

The burning of fossil fuels has altered the amount of carbon dioxide in the atmosphere so rapidly and so abundantly that now, we are…

— Sylvia Earle

They say if the warming trend continues, by 2015 Hillary Clinton might actually thaw out.

— Jay Leno

We know the surface temperature of the Earth is warming. It has risen by .6 degrees Celsius over the past 100 years. There was…

— George W. Bush

...it is fairly well agreed that the surface temperature will rise about 1°C as a modest response to a doubling of atmospheric CO2 if…

— John Christy

These proven positive consequences of elevated CO2 are infinitely more important than the unsubstantiated predictions of apocalypse that are hypothesized to result from global…

— Keith E. Idso

... The reality is that atmospheric CO2 has a minimal impact on greenhouse gases and world temperature. Water vapor is responsible for 95 percent…

— Walter Cunningham

... For nearly a decade now, there has been no global warming. Even though atmospheric CO2 has continued to accumulate - up about 4…

— Walter Cunningham

The industrialization of China alone would increase by 90 percent the concentration of CO2 in our atmosphere and would at least increase the atmospheric…

— John Olver

Based on the laws of physics, the effect on temperature of man's contribution to atmospheric CO2 levels is minuscule and indiscernible from the natural…

— Robert L Scotto

By geo-historical standards, today's atmospheric CO2 levels are remarkably - indeed dangerously - low. We need CO2 in the air to support plant growth…

— Roger Helmer

Each year we pump at least six billion tons of heat-trapping carbon into the innermost layer of our atmosphere, whose outer extent is only…

— Ross Gelbspan

There are many direct biological benefits that result from higher atmospheric CO2 concentrations. Two of the most important are increased plant photosynthesis and water-use…

— Keith E. Idso

The Moon stabilizes Earth's obliquity. Well, almost. The tilt actually varies between 22 and 24.5 degrees - and the variation is enough to induce…

— Seth Shostak