Footnotes:
1 – http://www.scientificamerican.com/article/the-truth-about-pot/
2 – https://mic.com/articles/76853/the-science-of-smoking-weed-how-marijuana-affects-your-molecules#.JJg9ebD5X and http://www.livescience.com/48337-marijuana-history-how-cannabis-travelled-world.html
3 – http://www.health.harvard.edu/mind-and-mood/medical-marijuana-and-the-mind
4 – https://mic.com/articles/76853/the-science-of-smoking-weed-how-marijuana-affects-your-molecules#.JJg9ebD5X
5 – https://mic.com/articles/76853/the-science-of-smoking-weed-how-marijuana-affects-your-molecules#.JJg9ebD5X
6 – https://www.newscientist.com/article/dn26988-skunks-psychosis-link-is-only-half-the-cannabis-story/
7 – http://www.talktofrank.com/faq/what%E2%80%99s-difference-between-resin-herbal-and-skunk
8 – http://www.nytimes.com/2014/06/04/opinion/dowd-dont-harsh-our-mellow-dude.html?hp&rref=opinion&_r=1
9 – http://www.lung.org/stop-smoking/smoking-facts/marijuana-and-lung-health.html?referrer=https://www.google.co.uk/
10 – http://www.nhs.uk/Livewell/drugs/Pages/cannabis-facts.aspx
11 – https://www.newscientist.com/article/dn25018-why-so-munchy-cannabis-shown-to-ramp-up-sense-of-smell/
12 – http://science.howstuffworks.com/marijuana4.htm and http://www.nhs.uk/Livewell/drugs/Pages/cannabis-facts.aspx
13 – https://www.theguardian.com/science/2014/jul/16/cannabis-paranoia-psychoactive-thc-mood
14 – http://www.scientificamerican.com/article/the-truth-about-pot/
15 – https://www.newscientist.com/article/mg22630204-500-withdrawal-drug-could-help-cannabis-addicts-kick-the-habit/
16 – https://www.newscientist.com/article/mg22630204-500-withdrawal-drug-could-help-cannabis-addicts-kick-the-habit/ and http://www.nhs.uk/Livewell/drugs/Pages/cannabis-facts.aspx and http://www.health.harvard.edu/mind-and-mood/medical-marijuana-and-the-mind
17 – https://www.newscientist.com/article/mg20527446-100-its-lack-of-balance-that-makes-skunk-cannabis-do-harm/ and http://www.nhs.uk/Livewell/drugs/Pages/cannabis-facts.aspx
18 – http://www.nhs.uk/Livewell/drugs/Pages/cannabis-facts.aspx
19 – http://bjp.rcpsych.org/content/202/5/381
20 – https://www.newscientist.com/article/dn26988-skunks-psychosis-link-is-only-half-the-cannabis-story/
21 – http://www.health.harvard.edu/mind-and-mood/medical-marijuana-and-the-mind
22 – http://science.howstuffworks.com/marijuana4.htm and http://www.nhs.uk/Livewell/drugs/Pages/cannabis-facts.aspx
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