The web page at https://data.london.gov.uk/dataset/london-atmospheric-emissions-inventory-2013 describes the various types of data held for monitored atmospheric emissions for the year 2013. Note that ADSS will ultimately be working on datasets compiled during a 50-year period, but you will be focusing only on a single year (2013), in the first instance.

What are the merits and demerits of:

Keeping the data sets on the local file system where they are normally held?

Moving the data to Hadoop HDFS storage?