If we measure the pH of the rain at the beginning of the measuring period, we will observe that the rain is acid as a consequence of the waste gases, which are concentrated in the atmosphere. However, later on we observe that the pH of the rain in our country is on good/normal levels. The acidity of the rain in Austria is observed to be on dangerous levels. The results of the rain acidity measurements may vary due to some factors such as the school location. For example, if the school, where the measurements have been take is located in an/industrial area, where the concentration of the waste gases in the atmosphere is much higher than the one in Greece. (Our school for example isn't located in an industrial area). The same factors may influence
the rain acidity measurements in Germany as well, because according to these measurements the rain in Germany is very acid too.
 
 

Posted by Gueorgui Karagiaourov Freiherr-vom-Stein, 10b on December 11, 1998:
The reasons for the lower pH in our area surely are the power plants that produce CO2 and SO2 and the heavy traffic in the Rhein - Main area with a lot of NOX. These chemicals are reacting with water to acids. Beside these facts there is a trash burning facility in Frankfurt and one is added near by. These installations do have gas-cleaning facilities but for sure this is not enough and so the pH is lower than in the area of your school. Posted by Gueorgui Karagiaourov Freiherr-vom-Stein, 10b on December 11, 1998:
The reasons for the lower pH in our area surely are the power plants that produce CO2 and SO2 and the heavy traffic in the Rhein - Main area with a lot of NOX. These chemicals are reacting with water to acids. Beside these facts there is a trash burning facility in Frankfurt and one is added near by. These installations do have gas-cleaning facilities but for sure this is not enough and so the pH is lower than in the area of your school.