finite arable land. Soil pollution occurs when the presence of toxic chemicals, pollutants or contaminants in the soil is in high enough concentrations to be of risk to plants, wildlife, humans and of course, the soil itself. Arable land is turning to desert and becoming non
Marijuana (thc) will be present in your blood for approximately 2 to 3 days after you have used it. It may be remain in your bloodstream past 2 to 3 weeks if you are a frequent and heavy user. Source(s): http://wiki4weed.com/how-long-does-weed-...
How Long Does Marijuana Stay In Your Blood. How long the THC stays in the userâs blood depends on the frequency of marijuana use. Persons who smoked marijuana just once in their lives would have traces of the metabolites cleaned out within three to five days.ow Long Does Marijuana Stay In Your Saliva. Most drugs leave residues in the saliva for only about 6 to 24 hours from last use. This is why the saliva drug test can only be used effectively if the person has used the drug on the day of the test.