Chemical pollution, noise pollution and climate change as a result of shifting temperatures and precipitation levels, are yet other potential contributory factors to colonization and the emergence of disease, by way of modifying both bird and microbial behaviour.
Silvestre Varela's late winner for Portugal against Denmark on Wednesday actually kept Holland in the tournament for the time being, and yet could ultimately be a contributory factor in their exit.
The main cause is a mystery yet to be unravelled but among the contributory reasons is the rapid spread of concrete across the land, overwhelming gardens and farms.
At the time Johnson submitted the contributory negligence defense, he had not yet been able to speak to Polehinke himself.
Although the cause of sudden sensorineural hearing loss (SSNHL) is yet to be elucidated, many theories have been proposed regarding potentially contributory etiologies.
While the significance of this finding is not yet clear the detection of numerous SSRs may once again be a contributory factor.
While explanations for these effects often propose senescent decrements in endogenous analgesic systems as a possible contributory mechanism, almost no direct empirical evidence for this hypothesis has yet emerged in human studies.
We aim to describe the generic themes contributory to this improvement in performance, which has led to progress not yet replicated elsewhere in the English-speaking world.
Far from suggesting yet another monocausal explanation for the murder of Europe's Jews, my book examines one contributory factor that has been insufficiently considered in previous analyses: the material self-interest of the German masses.
Even persuading European partners to issue a "postdated cheque" (a promise to change the treaties in the future) by then would be a struggle.Making it yet harder for Britain to make common cause with its neighbours is that most have contributory welfare systems which are less accessible to new immigrants than the British one, which is mostly funded from general taxation (see chart).
Yet, what should have been a fantastic winner for West Ham, became nothing more than a contributory factor in an afternoon's work against Crystal Palace because of referee Mark Clattenburg's poor judgement.
