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-...
On the average, THC can be detected in the urine of a casual user during 2-5 days, 1-2 weeks for usual users and up to one month for heavy users. In the blood marijuana usually stays only 1-2 days, about 24 hours in saliva, up to 4 weeks in sweat, and in hair it can be detected for up to 90 days.