Which factor is most likely to improve mexico's economic development.
a. petroleum exports
b. population increases
c. tax incentives
d. wartime economies

The mantle is made up of which structural zones?

Which city area has the most accessible oil reserves a) caspian sea b) siberia c)arctic coast d)lake baikal

Why is the huronian supergroup rock formation particularly interesting to scientists? because it looks like a cross-section of a giant, stone encyclopedia because it formed during the period when oxygen began to accumulate in the atmosphere because it contains unusually large amounts of oxygen and sulfur because it dramatically altered the planet's development when it first formed