Why are there different theories about the effects of global warming?
a. there is no data to support global warming.
b. global climate is complex, so changes in global climate are hard to predict.
c. increased levels of carbon dioxide are offset by other changes.
d. there has been a decrease of extreme weather.

Which statements describe cultural influences? florida is bordered by water on three sides. french is spoken in parts of louisiana. forests are cleared to provide space for cattle grazing. male children are encouraged to attend the university. the longest river on the continent is located here. birthdays are celebrated on january 1st. per capita income of northern buckland is more than $100,000.