I didn’t realize or remember this for years.

Polar bears are excellent long distant and duration swimmers even in icy waters.

Glaciers that reach the sea normally calve off ice. They are caving off ice because of the ice behind it is moving down hill. For their to be continuously moving ice there has to be ice and snow being added above or on top of the the flow. This is a source of ice bergs. Ice bergs have been around for a long time.

Shalom.

The photosynthesis process in plants provide us with oxygen we need. But plants need carbon dioxide, light, and water to do that. We and the animals return to the plants CO2 when we breath in Oxygen and breath out carbon dioxide.

Every intellectual and educated person should know this or should be willing to learn it. This is taught in all introductory biology classes.

CO2 is not a pollutant. It is necessary for all life on earth. It is also a trace gas in the atmosphere. (CO2 comprises about 0.03% of dry atmosphere). With out precious CO2 there we would not have the oxygen or food we need.

Interestingly, green house operators add carbon dioxide to the green house. This makes pants grow faster, bigger, and produce more. This is empirical* evidence of beneficial effects of CO2. The effect is that of fertilizer, actually, food for the plants.

CO2 are plants’ only source of carbon to build their carbon based life. All organic molecules (human, animal, and plants) get all their carbon from carbon dioxide, except for the carbon from the original creation of life. We get our carbon from eating.

Photosynthesis is part of a whole global cyclic process that needs and provides carbon dioxide and oxygen for all life. Plants take in light, carbon dioxide, and water and provide oxygen and food energy to humans and animals. Humans and animals take in food (to get chemical energy) and oxygen and we give off carbon dioxide that plants need.

This is a very fascinating subject. A child’s or adults biology book talks all about it.

Enclosed for your pleasure are some links to some websites that you might be glad to have as an instant introduction or review of life giving and necessary photosynthesis that recycles precious cordon dioxide and oxygen. And photosynthesis turns light energy into chemical energy plants and animals use.

http://www.ftexploring.com/pho.....synth.html
http://www.homeharvest.com/car.....chment.htm
http://www.emc.maricopa.edu/fa.....ookPS.html
http://www.iloveco2.org/

*A dictionary definition
empirical |em?pirik?l|
adjective
based on, concerned with, or verifiable by observation or experience rather than theory or pure logic : they provided considerable empirical evidence to support their argument.

Todah rabbah.