Fossil fuels are considered nonrenewable resources because they
a. burn so quickly.
c. take hundreds of millions of years to form.
b. are in such high demand.
d. pollute the air.

What is the y-coordinate of the point that divides thedirected line segment from j to k into a ratio of 2.3? -6-557

Which barrier to economic development is shown in the following examples? i. the high rate of hiv infection in underdeveloped nations ii. the use of children as soldiers in uganda’s army in the early 2000s iii. low literacy rates in underdeveloped nations with limited exposure to adequate education a. foreign debt b. political instability c. widespread disease d. low levels of social welfare

Describe the four major spheres of the earth system; identify the parts of the earth they each represent. explain what is meant by the "earth system."