According to polybius, how democratic was the roman republic?

Polybius was a Greek historian. He thought that in the “democratic Rome” the only democratic element found in the Roman constitution was that of elected assemblies and the tribunes of working class. While others including magistrates, Senate etc. was occupied by the aristocrats. By exaggerating the democratic elements the Rome was presented democratic in the eyes of modern scholars. 

what are local authorities doing to fix the problem

explanation:

radioactive dating, also known as  radioisotope dating  is a process that in  estimating the approximate  age  of  rocks. these data can be analyzed from  the studies dealing with the  decay of the radioactive elements that are present in these rocks. in nature, there are a few types of materials or atoms which are quite unstable and they spontaneously decay or breakdown to form other kinds of atoms.