Porosity decreases Choose one: A. with the cementing of sediments by mineral grains from groundwater. B. when fluids passing through a rock dissolve parts of the rock. C. when rocks develop joints or faults. D. with decreasing compaction of sediments or rock.

The us and canadian governments are doing all of the following to combat environmental problems except a. encouraging the use of public transportation b. enacting clean water policies c. requiring emissions testing d. limiting animal populations in some regions