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Dr. Patrick Michaels, director of the Center for the Study of Science at the Cato Institute, provides insight into the debate over climate change and the political games played to create policy

Here's a quick review of everyone's High School Sophomore biology/chemistry courses.

1. Carbon dioxide is produced by living creatures through a process called respiration. Living creatures breathe in Oxygen/02, and utilize the oxygen in their bodies, in turn releasing carbon dioxide/CO2 as a waste product when they breathe out. All living creatures do this.

2. Oxygen/O2 is produced by green living plants through the process called transpiration. Green living plants take in Carbon Dioxide/CO2, and utilize CO2 in their bodies, in the presence of sunlight produce their own nutrition through photosynthesis and release Oxygen/O2 as a waste product when they transpire. All green living plants do this. In the absence of sunlight, such as at night, the green living plants will reverse this process and switch to respiration but they are in a shutdown mode and only utilize a small amount of Oxygen during this time.

Oxygen/O2 as a waste product when they transpire. All green living plants do this. In the absence of sunlight, such as at night, the green living plants will reverse this process and switch to respiration but they are in a shutdown mode and only utilize a small amount of Oxygen during this time.

One is required to produce what the other requires. Without both, all life would end. If there are no living creatures to utilize the Oxygen, the planet would become too saturated with oxygen, which would be toxic for the plant life. If there are not green living plants to use the Carbon Dioxide, the planet would become too saturated with Carbon Dioxide which would be toxic for the living creatures. This is called a symbiotic relationship. If one dies, both die.

"Desertification is a fancy word for land that is turning to desert," begins Allan Savory in this quietly powerful talk. And terrifyingly, it's happening to about two-thirds of the world's grasslands, accelerating climate change and causing traditional grazing societies to descend into social chaos.

The Thwaites Glacier is the largest, most menacing source of rising sea levels all over the world, and it is melting at an alarming rate. For years, scientists have warily watched it from afar, but in November, a team set out on a perilous journey to investigate what is happening below. Science correspondent Miles O’Brien reports on what they discovered.