Reducing emissions from all greenhouse gas can help produce a carbon neutral result through energy efficient, renewable energy purchases, and carbon offset products. True or false
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- 1) Heating the water in a 55-gallon water heater requires about 2.0 x 103 kJ of energy. a) Assume the energy came from natural gas with 80% efficiency; how many grams of natural gas are required? b) Assume the energy came from electricity with 80% efficiency and that the electricity was produced from the combustion of coal with 30% efficiency; how many grams of coal are required? For problem above, calculate how much CO2 in grams is emitted to the atmosphere. For a: Use the balanced equation for the combustion of methane (CH4) to determine how many grams of CO2are produced from the amount of natural gas required. For b: Assume that coal produces 5.25 kJ of energy per gram of CO2 produced. Calculate how much CO2 in grams is produced.Since the industrial revolution (~1750), humans have released over 1.5 trillion tons of CO2into the Earth’s atmosphere. How much carbon (CO2 as carbon) has been released into the atmosphere?It is meeting the energy requirement of the people at present using the available sources of energy without compromising the need of future generations. O a. environmental efficiency O b. spheres of sustainability O c. renewable energy o d. environmental sustainability
- According to the Energy Information Administration, Dept, of Energy, which country produced the largest amount of CO2 emissions from the burning of fossil fuels, in Gt in 2006?The default carbon dioxide emission factor for biodiesel fuel is 70,800 kg/TJ, and the emission factor for diesel fuel is 74,100 kg/TJ. Which diesel fuel, biodiesel or “regular” diesel fuel, has the greater carbon intensity per unit of energy? What are their respective carbon intensities compared to natural gas? If a city were to invest in climate-friendly buses for public transportation, should it choose a diesel-powered bus, a biodiesel-powered bus, or a natural gas-powered bus?Due to the global warming and some other climate issues, there has been frantic efforts by states and other key stakeholders in the energy value chain to curb exploration, combustion and usage of fossil fuel. As an energy engineer, what are some of the challenges of the conversion process and their mitigation?
- It has been suggested that carbon dioxide emissions should be taxed at $30 per metric ton (106 g C). Removal of CO2 from the atmosphere would be worth the same amount. Assume that the atmospheric mixing ratio of CO2 is 400 ppm. What is the value of the carbon in 1 cubic kilometer (km3) of air at Earth’s surface? Calculate the value of all the CO2 in Earth’s atmosphere? [Hints: The total atmospheric mass is 5.1480×1018 kg and it is composed of 80% N2 and 20% O2.What are the different sources of Sulfur oxides (S0X) emissions?A factory uses carbonic acid in its industrial processes so that 90% by weight is used in industry and the rest is emitted into the atmosphere as pollutants. Calculate the amount of carbon dioxide emitted into the atmosphere per hour. If you know that the amount of carbonic acid used daily is 3 tons and the factory works 12 hours a day
- 1 1.31 If the U.S. fleet of vehicles suddenly became 15% more fuel effi- cient, how much annual emissions of CO2 would that prevent? Assume the following: 200 million vehicles in the U.S., each driv- ing (on average) 12,000 miles/year, with an average fuel economy of 18 mi/gal. Also assume each gallon of gasoline contains about 5 lb of carbon.A polluted air stream flowing at 12,000 acfm at 90 °F and 1 atm has a concentration of 500 ppm of ethylbenzene (C8H10). Pilot plant studies of the adsorption process indicate that 11 lb (net) of ethylbenzene will be adsorbed per 100 lb of carbon during normal everyday operations. Calculate the minimum amount of carbon needed m one bed for a two-hour run time. Give your answer In pounds.List three examples of energy production and use practices that you think are unsustainable. Write a short paragraph for each explaining why they are unsustainable and how we might make each of them more sustainable.