An environmental scientist gives a demonstration on composting. roger is in the audience. he wonders how composting to slow climate change.

Distance that the transcontinental railroad covered from omaha to san francisco.

Which of the following factors is not used to measure a country’s standard of living? a.) life expectancy b.)educational levels c.)divorce rates d.) gross income

Name the two rivers that run through the fertile crescent. how were the rivers both positive and negative to societies of the fertile crescent?