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The numbers speak for themselves.

According to many leading scientists, more than 350 parts per million of carbon dioxide in the atmosphere and our planet is doomed. That number is currently 390.

In order to turn the clock back on global warming, Iowa Lakes Community College wind turbine and energy technology students Saturday joined people in 181 countries in the greatest demonstration for environmental change in history. The students ascended the college wind turbine on the south edge of Estherville and unveiled a 350.org banner, a four-foot by 10-foot insignia of the organization that is working to not only reduce but reverse the amount of carbon dioxide in the atmosphere. The event at Iowa Lakes was one of 5,200 worldwide.

"Obviously wind energy is a good means of limiting the carbon footprint," said Loma Roggenkamp, wind student who coordinated the Estherville event. "This is a number we can shoot for and it's all about the future.'

Windustry.com sent the banner to the students to display, and the banner will be placed in one of the program classrooms.