Why has the CO2 level of the atmosphere been increasing for the past 200 years?

What will be an ideal response?


The rapid increase in CO2 concentrations since the onset of industrialization is obvious. The use of coal and other fuels is the most prominent means by which humans add CO2 to the atmosphere, but it is not the only way. The clearing of forests also contributes substantially because CO2 is released as vegetation is burned or decays.

Environmental & Atmospheric Sciences

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Earth emits infrared radiation ____

A) only at night B) only during the day C) at variable times D) continuously

Environmental & Atmospheric Sciences

The total number of cataloged species on Earth in both marine and terrestrial environments is currently 1.8 ________

A) thousand B) million C) billion D) trillion E) quadrillion

Environmental & Atmospheric Sciences

Mediterranean climates are characterized by ____

A) mild, wet winters and mild-to-hot, dry summers B) cold, wet winters and hot, humid summers C) cold, relatively dry winters and mild, humid summers D) mild, wet winters and mild, humid summers

Environmental & Atmospheric Sciences

The highest rates of HIV/AIDS in this region are found where?

A. Ethiopia and Somalia B. Mali and Niger C. South Africa, Botswana and Zimbabwe D. Madagascar

Environmental & Atmospheric Sciences