It is generally impossible to know, for example, whether a certain level of air pollution will result in an increase in mortality from respiratory disease, whether a certain level of water pollution will reduce a healthy fish population, or whether oil development in an environmentally sensitive area will significantly disturb the native wildlife.
"People have built up businesses around a certain level of water availability that's no longer there," says Craik.
A water quality index (WQI) is a mechanism for presenting a cumulatively derived numerical expression defining a certain level of water quality.
This indicates that a certain level of water content is most appropriate for retaining the microbiological and enzyme activities of the vermicast; and the presence of water above or below that level hastens the cast's aging.
However, beyond a certain level of water application, crop yields suffer due to a lack of aeration in the root zone and the marginal product of water becomes negative.
It also mandates certain levels of insurance coverage.
Certain levels of money should demand loyalty.
Additionally, drugs can boost certain levels of hormones.
As mentioned previously (Kwon & Sarmadi 1995), the water absorption increased after laundering and the rate of water absorption varies upon fabric status (finished/unfinished) and it increased up to certain level of washing then water absorption decreased, which is co-related to our obtained results of water absorption in denim garment washing.
Why do we say, "Here's a tent, a blanket, food and water, a certain level of healthcare – but anything else you might wish for, such as a school, an apprenticeship, a satisfying job, all the tools for self-sufficiency... no, sorry, that's not for you"?
