Your answer for Question 4 should be far in the future past the year 2100, the end of this century. Let's stick with the scenario described in Question 4 and assume that after 2066 humans start removing carbon from the atmosphere on a massive scale using technology. Such technology is currently called carbon sequestration and storage (CSS). At what rate, in gigatonnes per year, will humans need to remove atmospheric carbon via CSS to ensure that the atmospheric concentration of carbon dioxide returns to 350 ppm by 2100? If modern CSS techniques cost -$40 billion per gigatonne of carbon, how much will we spend each year to remove this excess carbon? Use the steps described in Question 4 to calculate how much excess carbon remains in the atmosphere by the end of 2066. At that point, we only have 33 years to remove the excess carbon before the year 2100. Divide that excess carbon by 33 years to determine the rate of removal that takes combines the ocean reservoir, the lithosphere, and CSS. Subtract the modified ocean and lithosphere rates from Question 4 from this combined rate to calculate the necessary CSS rate of removal. Multiply the CSS removal rate by $40 billion ($40,000,000,000) to calculate the annual cost. Please type your answers out in the following format. Rate at which humans will need to remove atmospheric carbon via CSS techniques after 2066 = XX gigatonnes/year. The annual cost of removing atmospheric carbon at that rate = $ YYY Billion. Although showing vour work is not required, showing work for one calculation may help you earn partial credit if any mistakes are made. Your answer for Question 4 should be far in the future past the year 2100, the end of this century. Let's stick with the scenario described in Question 4 and assume that after 2066 humans start removing carbon from the atmosphere on a massive scale using technology. Such technology is currently called carbon sequestration and storage (CSS). At what rate, in gigatonnes per year, will humans need to remove atmospheric carbon via CSS to ensure that the atmospheric concentration of carbon dioxide returns to 350 ppm by 2100? If modern CSS techniques cost -$40 billion per gigatonne of carbon, how much will we spend each year to remove this excess carbon? Use the steps described in Question 4 to calculate how much excess carbon remains in the atmosphere by the end of 2066. At that point, we only have 33 years to remove the excess carbon before the year 2100. Divide that excess carbon by 33 years to determine the rate of removal that takes combines the ocean reservoir, the lithosphere, and CSS. Subtract the modified ocean and lithosphere rates from Question 4 from this combined rate to calculate the necessary CSS rate of removal. Multiply the CSS removal rate by $40 billion ($40,000,000,000) to calculate the annual cost. Please type your answers out in the following format. Rate at which humans will need to remove atmospheric carbon via CSS techniques after 2066 = XX gigatonnes/year. The annual cost of removing atmospheric carbon at that rate = $ YYY Billion. Although showing vour work is not required, showing work for one calculation may help you earn partial credit if any mistakes are made
