And least anyone should forget this little matter:
How Strong is cannabis?
A typical joint of cannabis in the 1960s contained 10mg of the brain-damaging THC. Today, thanks to sophisticated cultivation and plant breeding, a joint can contain 150mg of THC - up to 300 mg if hashish oil is added, according to Heather Ashton of Newcastle University.
She warns that a stronger 'high' can provoke severe anxiety and mental illness, seriously impairs driving skills, damages lungs five times as much as cigarettes, weakens the immune system and can lead to rare throat cancers or heart attacks.
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