The cotton pillowcase is infused with silver ions, which basically S&D (seek and destroy, for those of you not in the military-lingo know) bacteria before they have a chance to multiply and render your pillowcase a three-ring circus of vileness.
Habitat destruction is the process in which natural habitat is rendered functionally unable to support the species present. In this process, the organisms that previously used the site are displaced or destroyed, reducing biodiversity.
Habitat fragmentation can be caused by geological processes that slowly alter the layout of the physical environment (suspected of being one of the major causes of speciation), or by human activity such as land conversion, which can alter the environment much faster and causes extinctions of many species.