A goal taking which of these lengths of time to achieve is most likely to be long-term goal ?

Ascientist has predicted that the population of earth will continue to grow exponentially until the year 2300. at that point, we will reach carrying capacity of earth’s resources, and population growth will plateau. if the scientist’s prediction is correct, what can you predict about human energy use at that time? justify your answer by explaining the relationship between population growth and energy use. (5 points)

98 points! include an answer and in advance!

Why is it essential to operationally define the variables in a study?