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-...
Typically, THC is out by 3-5 days. Marijuana does not enter your blood stream - THC, the active element in cannabis does. THC can remain detectable in the body for up to thirty days, and in hair samples for up to six months. There is no reliably proven way to remove THC from your system, and the products sold by head shops and supplement stores are a scam. The only way to make it undetectable in hair would be to remove all body hair.