When researching into to the topic of mortality rates, (Scott et al, 2005) observes that it is very complex to understand the historical patterns of mortality in England and that the ‘demographic parameters of mortality decline are unclear’. Mortality rate can vary when studying various types of geographic settings, different periods of time and on the age and gender allocation of a given population. Scientist uses mortality rates in different ways and are interested in knowing the number of infant mortality rate, maternal mortality rate and crude mortality rate, this therefore gives a broader explanation of the matter under study and can figure out the mortality …show more content…
(Gratan et al, 2003) explains that volcanic eruptions can affect ‘distant environments’ such as England. This paper explains the effect of volcanogenic pollution on human health that lead to a mortality crisis in England as shown in table 1. With this crisis, some local regions of England had higher mortality rates than others during this period, including Bedfordshire and East Anglia. The sulphur dioxide that was released from the eruption was mixed with water vapour in the lungs that caused victims to choke during the summer of 1783, according to (Castella ,2010). The report also shows that there was an estimate of 20,000 of deaths during the summer of 1973 in Britain because of the eruption in Iceland. Both sources of data here provide statistical evidence showing the patterns of mortality rate during the summer of 1973 and so gives sufficient evidence to classify it as mortality crisis. On the other hand, (Castella ,2010) includes exaggerated claims in his report such as the ‘farm labourers began dropping like flies’, this exaggeration is un-realistic evidence for mortality patterns and so effects the reliability of this