Although data quantifying particulate emissions from construction and demolition work is scarce, some research carried out in USA gives an estimation for TSP of tonnes/hectare/month in zones where large construction work is in progress. The quantity of particles emitted in each city from this source will depend on the type of construction in progress. These particles are mainly present in size fractions greater than 10µm. However, some fraction of the total amount is likely to be present as smaller particles. Also, some of this dust will be resuspended either by traffic or wind. It is also difficult to assess the amount and composition of fugitive.
