Task: Question Answering
Input (English): Process:  -Solution caves are formed in limestone and similar rocks by the action of water -After a rain, water seeps into cracks and pores of soil and rock -The water percolates beneath the land surface -Some of the water reaches a zone where all the cracks and pores in the rock are already filled with water -Rainwater absorbs some carbon dioxide as it passes through the atmosphere and even more as it drains through soil and decaying vegetation -The water combines chemically with the carbon dioxide -A weak carbonic acid solution is formed -This acid slowly dissolves calcite, forms solution cavities, and excavates passageways -
 Question: What is the effect of If Kidneys stop working on less carbonic acid solution is formed.?
Output (English): none