What evidence supports the idea that both the maya and aztec civilizations were influenced by an older civilization?
a. ball courts
b. calendars
c. floating islands
d. roads
e. terraced fields

Which course of action did president carter propose in order to solve this problem for the next generation? a. contract with foreign nations to build wind turbines b. reduce federal spending on solar cell energy research c. drill fewer offshore wells to conserve marine life d. develop alternative energy sources