Scientist Dr. Paul Mayewski.

An expert in climate change research, Paul Mayewski led the National Science Foundation's Greenland Ice Sheet Project 2. The project extracted ice cores chronicling 100,000 years of climate history. Mayewski, with co-author Frank White, writes about their expeditions in the new book, The Ice Chronicles: The Quest to Understand Global Climate Change (University Press of New England). Mayewski is also co-director of the Institute of Quaternary and Climate Studies at the University of Maine.

Dr. Paul Mayewski, chief scientist with the Greenland Ice Sheet Project 2. The project archives tubes of ice extracted from Greenland which chronicle 250,000 years of the earth's atmosphere, and changes in the climate. From the ice, scientists can pinpoint the start of the industrial revolution, or the end of the ice age. Scientists hope, by looking at the ice, they can better understand rapid changes in the earth's climate. (Interview by Marty Moss-Coane)

Journalist Chloe Sorvino says the meat industry pollutes the environment, contributes to climate change and leaves the meat supply chain vulnerable to major disruptions.