Anthropogenic emissions have, until now, been collected, but not harmonised . These consist, for example, of data of nitrogen oxides (NOx) emissions, smog, methane, CO 2 and even pollen and dust produced, among others by heavy industry and power plants.

Gold nanoparticles ( AuNPs ) present the many advantages of displaying relative biocompatibility, high light absorption and strong optical scattering properties. They are therefore good candidates to be used as probes for cancer imaging .