Global warming isn't just a natural cycle

The earth’s temperature changes naturally over time. Variations in the planet’s orbit, solar cycles, and volcanic eruptions can all cause periods of warming or cooling.

But Kim Cobb, a climate scientist at Georgia Tech, says none of these natural causes can explain the earth’s current warming trend.

Cobb: “What we see clearly is that the rate and the magnitude of current warming really dwarfs anything in this most recent geologic period.”

She says that the current concentration of global warming pollution in the atmosphere is the only factor that explains it.

Read the story by Sara Peach from Yale Climate Connections - “Global warming isn't just a natural cycle.”