Exit what would most likely happen if the carbon dioxide in earth's atmosphere were reduced by half?
a. earth's surface would become cooler.
b. the ozone layer would become thicker.
c. there would not be enough oxygen to breathe.
d. earth's air pressure would increase dramati

What must happen for new french words to be published in official dictionaries? a. they must be approved by the french academy b. they must be voted on by the people of france c. they must be used by famous french writers d. they must be used by philosophers a. they must be approved by the french academy

During which era in earth's history were the first insects? mesozoic precambrian cenozoic paleozoic

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