Global immigration trends have largely resulted from:
a. the shrinking gap between rich and poor nations.
b. political conflicts and socioenonomic development.
c. population growth in developing societies.
d. international labor agreements originated by the UN.
Question 2
As of 2013, an estimated __________ people are living in a country other than their country of origin. Another __________ people would like to move to another country permanently if they had the opportunity.
a. 232 million; 700 million
b. 373 million; 800 million
c. 516 million; 900 million
d. 1 billion; 1 billion
Species-rich floras of chalk grassland compared to species-poor floras of acid soils.
Rover exposes silica-rich dust on Mars
Average Global Temperature during the Phanerozoic
Predicted Temperature Trends Through the 21st Century
People in poor, urban areas often find themselves in “food deserts"
The heart and its major blood vessels. Oxygen-rich blood is pumped from the lungs to the left