4. Using data from the U.S. Energy Information Agency or other resources presented in lecture, determine how the carbon intensity and energy intensity of the US economy has changed from 1990 to 2005 and from 2005 to the present. If the U.S. population is growing at an annual rate of 1% and the economy averages a 2%/year growth rate, what do you then expect to occur for total U.S. carbon emissions? 4. Using data from the U.S. Energy Information Agency or other resources presented in lecture, determine how the carbon intensity and energy intensity of the US economy has changed from 1990 to 2005 and from 2005 to the present. If the U.S. population is growing at an annual rate of 1% and the economy averages a 2%/year growth rate, what do you then expect to occur for total U.S. carbon emissions