a) According to the annual report in 2016 page 192-193, the total amount of particulate matter (PM), which originates mainly from the operation of small trucks and vans (0.306 tonnes) and large trucks (0.345 tonnes), is calculated by adding these amounts together (0.651 = 0.306 + 0.345).

b) According to the annual report in 2017 page 209, HOWEVER, the amount of PM emissions from small trucks and vans is 0.279 tonnes while the figure for large trucks is 0.253 tonnes, altogether 0.532 tonnes