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-...
Baltimore, MD: Trace levels of delta-9-THC, the primary psychoactive ingredient in marijuana, may be identifiable in the blood of heavy cannabis users for up to seven days after their drug use has ceased, according to clinical trial data to be published in the journal Addiction.revious studies had indicated that low levels of THC typically remain present in the blood of chronic users for a period of time not exceeding 48 hours. Investigators noted that all of the subjects who tested positive for the presence of THC in their blood on day seven were female.