Warm Up #4 The atmosphere is one important carbon reservoir. (i) Describe a biological process by which carbon is removed from the atmosphere and converted.

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Presentation transcript:

Warm Up #4 The atmosphere is one important carbon reservoir. (i) Describe a biological process by which carbon is removed from the atmosphere and converted to organic molecules. (ii) Describe a biological process by which carbon is converted from organic molecules to a gas and returned to the atmosphere. Oceans and terrestrial systems are also important carbon reservoirs. (i) Explain how atmospheric carbon is incorporated into two oceanic sinks. (ii) Identify one terrestrial sink, other than fossil fuels, that stores carbon for thousands to millions of years. Nitrogen is another element important to all organisms: (i) Identify one reason why nitrogen is needed in all organisms. (ii) Identify and describe TWO steps in the Nitrogen cycle.

Farming and GMOs

Green Revolution Green Revolution – hybrid species of grains Goal: more crop yields Expensive – poor farmers can’t afford hybrid seeds Hunger crisis solved?

Mutant Fruit! Genetically Modified Organisms (GMO’s) – food with changed DNA Improves crop yields Disease, drought, etc. Pest-repellant No pesticides needed Enriched with vitamins & minerals Nutritious Oral vaccines Developing countries

Creating the Mutants Common Gene Mutations Bt gene = insect killing gene HT gene = herbicide (Roundup) tolerant gene

Safe? [Franken-foods] New pests = possible Expensive Biodiversity Threatened Bred vs. wild salmon Possible health effects Livestock deaths from eating GM foods. Cancer?

Staple Carb. Crops Rice Wheat Corn Soybeans Potatoes

High Fructose Corn Syrup (HFCS) Corn-based sugar natural Found in: Sodas and Juices Candy and Fast Food Same nutrition as sugar Surplus of corn = HFCS Obesity & diabetes connection Obviously….

How Seafood is “Farmed” Aquaculture – growing aquatic species in pens Disrupts food chain, contaminates water (fish waste) Herbivorous fish = good (China’s rice paddies)

Meat…a symbol of Wealth Meat = expensive to produce Cows, chickens, pigs need a lot of GRAINS CAFO (confined animal feeding operation) – animals housed/fed (soy and corn) Antibiotics in food

Where Things Get Real Cut meat eating by 20% = MORE energy saved than EVERYONE driving Prius Chicken “housing” Too fat to move (KFC) Foie Gras (Goose Liver) A disease, not a delicacy Cow calf housing = hutches Less movement = more tender veal Animal Cruelty? Uh, yeah…

Uplifting Videos: Meat.org Kentucky Fried Cruelty http://www.youtube.com/watch?v=sARe wW_Po64&feature=related Foie Gras: A Disease not a Delicacy http://www.youtube.com/watch?v=32815 SIgq1A Super Cows http://www.youtube.com/watch?v=Nmkj 5gq1cQU&feature=fvwp&NR=1