Scientists Who Don’t Agree Climate Change is Happening
My impression is that this “3%” generally consists of scientists who acknowledge that CO₂ is rising due to human activities, and who also...
Below you will find all of the questions our experts have addressed—with the most recent, appearing first.
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Factors That Triggered the End of the Last Ice Age
We believe that the fundamental trigger for the end of the last ice age was increasing insolation (more heating from the sun) over the northern...
The Impact of the Ozone Layer
Ozone is an atmospheric gas made of three oxygen atoms bound together (chemical formula O₃). It constitutes a very small fraction of the air close...
The Earth’s Fluctuating Temperature
Natural fluctuations are indeed a feature of Earth’s climate. But, if we look at the climate of the past 150 years (for which we have direct...
The Fires in Australia and Hurricane Sandy
Science has advanced to the point where we can analyze an extreme event and tease out the role that climate change played in that event—how much...
Carbon Dioxide Levels on Our Current Emissions Path
The last time the atmospheric CO₂ was above 1000 ppm was probably the Triassic, more than 200 million years ago. Atmospheric CO₂ has varied in the...
The Oceans Role in Moderating the Climate
The short answer? No. But that doesn’t mean there is no need for worry. There are two important ways the ocean controls climate: through the heat...