Scientist says sun spots, not greenhouse gas, affects climate

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It's been a rough winter in Wisconsin, with record breaking snow falls and low temperatures.

The beginning of spring has continued to see snow flurries.

Dennis Avery, senior fellow at the Hudson Institute, believes temperatures are being affected by natural cycles with the sun.

He believes there is a strong correlation between how long sunspot cycles last and how cold the Earth gets.

He says the current sun spot cycle has lasted 12 years, rather than a more common cycle of 11 years, and hasn't ended yet.

He believes the greenhouse gas carbon dioxide is not a significant factor in raising temperatures.

He points to a timeline from 1976 into the 1990s, and says carbon dioxide levels went up along with a rise in temperatures.

Tags: wisconsinnews, climatechange, sunspots, dennisavery