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The 2013 IPCC report states that if there is a doubling of preindustrial level of carbon dioxide there will be a “likely temperature increase” in the range of ________.

Solar radiation is reflected back to space from ________.

The two main sources of human-generated aerosols are ________ and ________.

________ is an erosional contact between tilted, older strata below and horizontal, younger strata above.

All of the following statements concerning dry lands are true EXCEPT ________.

Which of the following denotes the divisions of the geologic time scale in correct order of decreasing lengths of time beginning with the longest time interval and ending with the shortest?

The two main sources of human-generated aerosols are ________ and ________.

We now live in the ________ era.

Solar radiation is reflected back to space from ________.

The two main sources of human-generated aerosols are ________ and ________.