To help understand and visualize the extent and intensity of the human impact on the earth, some scientists use the concept of the human (or ecological)
A) analysis.
B) convergence.
C) footprint.
D) region.
E) settlement.
Question 2
The average user in Germany upgrades their cellphone every (almost) 4 years, and every 6 1/2 years in Brazil. In the U.S., the average user upgrades their cell phone every
A) less than 2 years.
B) 4 years.
C) 6 years.
D) more than 8 years.
