Which best describes proper disposal technique?
a.
a bin should be labeled “chemical wastes and hazardous waste.”
b.
a bin should be labeled “chemical wastes and broken glass.”
c.
students should know proper disposal of the chemicals they use.
d.
students can dispose of all chemicals in the sin

The correct answer is A.

Proper disposal technique is very important because there are different types of waste. Chemical waste is very hazardous as it may cause reaction to the skin if touched or not stored properly. Chemical compatibility with the disposal bin must also be considered.

A waste disposal bin should always be properly labeled. Only chemical waste should be disposed there and it should never be mixed with any type of glass. Labeling the bin is thus very important and should always be read carefully. If if the students know all about the disposal techniques they should always read the bin's label and never dispose all of the chemicals into a regular, non-labeled bin.

the invasive species was introduced due to commercial purpouses, as there was a demand for fur clothes and hence, a business opportunity connected to this product. actually, it was when the nutrias scaped, causing harm to the us ecosystems when they acquired the status of invasive species. in this case they have caused an environmental problem, but it could have affected also economic interests or even human health.