Rainwater becomes acidic as it falls through the air. How does ...

[Caiter2013]

Rainwater becomes acidic as it falls through the air. How does this affect areas of Karst topography?
 
  What will be an ideal response?

Question 2

From the 1930s to the 1970s, extensive groundwater pumping in the San Joaquin Valley of California caused the ground to subside by as much as 9 m. How does groundwater withdrawal contribute to land subsidence?
 
  What will be an ideal response?

[Yixagurpuldink]

Answer to Question 1

Saved me massive time.

Answer to Question 2

Answer: Land subsidence can occur in areas underlain by thick sequences of poorly consolidated sediments. As water is pumped from an aquifer with layers of easily compressed waterbearing clays (low-permeability) interbedded with layers of sandy (high-permeability) rock, water slowly leaks out of the clay layers. As the clays become dewatered, they compact, and the land subsides.

[Caiter2013]

Thanks for the timely response, appreciate it

[dawsa925]

Gracias!