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- Name three sources of atmospheric CO25a. Does the atmospheric CO2 level stay the same throughout the year or does it change throughout the year? https://www.youtube.com/watch?v=x1SgmFa0r04Global Carbon Dioxide Cycling Expressed as Human Equivalents If 3 x 1014 kg of CO2 are cycled through the biosphere annually, how many human equivalents (70-Kg people composed of 18% carbon by weight) could be produced each year from this amount of CO2?
- Environmentally conscious Susan has been told that a newelectric car will only generate 6 ounces of greenhouse gases (GHG) permile, but that a standard internal combustion car is double that at 12ounces per mile. However, the nature of electric cars is such that the new technology and electric batteries generate 30,000 lbs. of GHG to manu-facture and another 10,000 lbs. to recycle. A standard car generates only 14,000 lbs. of GHG to manufacture, and recycling with established tech-nology is only 1,000 lbs. Susan is interested in taking a systems approach that considers the life-cycle impact of her decision. How many miles mustshe drive the electric car for it to be the preferable decision in terms ofreducing greenhouse gases?What gas is a human-made pollutant in the lower (surface) atmosphere but a natural and beneficial gas in the stratosphere? (a) CO2 (b) CH4 (c) O3 (d) CFCs (e) N OWhat % of CO2 is absorbed by the oceans from burning fossil fuels?
- Why is it important the concentration of CO2 in the atmosphere?The carbon footprint is the amount of GHG produced from an activity or a product. What would be the carbon footprint of a power plant producing electricity from coal. Calculate the GHG emission of CO2 per kWh of electricity produced. Assume the energy efficiency of the power plant as 38% and the heating value of coal as 4500 Kcal/Kg. Assume coal is 50% carbon. The answer you will get is also known as the emission factor for a coal power plant.At a time before life existed on Earth, our planet's atmosphere contained extremely little or no Question 2 options: a) nitrogen gases b) water vapor c) carbon dioxide d) gaseous oxygen e) noxious gases
- Whichof the following gases contribute to warming of the Earth’s surface through thegreenhouse effect?a.Carbon dioxideb.Methanec.Water vapord.Nitrous oxidee.All of the choices applyHow the increase of CO2 levels have an affect on the hydrosphere ?If no photosynthesis or biological pump operated in the ocean, what would likely happen to the concentration of atmospheric carbon dioxide?