because it does not contain acid
Because rainwater is mildly acidic. Acid in the rainwater dissolves the limestone.
Rain water is generally acidic
That depends where you live. Acidic rainwater is not always better than groundwater.
Erosion I think :-)
Yes it can
Rainwater is normally acidic because the carbon dioxide in the air which mixes with rainwater to form weak acid. That's why its acidic ^_^ Rainwater is also because of the pollutions in the air and it mixes with the water so its not good. meee!
salt salt makes it more acidic
Could be either, although it's essentially rainwater, which is normally acidic.
The rainwater is more acidic after passing through polluted air.
Atmospheric sulfur dioxide that dissolves in it on its way down.
because rain water is acidic in nature
Yes, rainwater is naturally slightly acidic due to the presence of carbon dioxide in the atmosphere. Carbon dioxide mixes with rainwater to form carbonic acid, which lowers the pH of the rainwater. However, human activities, such as emissions from burning fossil fuels, can increase the acidity of rainwater to harmful levels, leading to acid rain.