Moderation is the key to success with anything. No exceptions with weed. Marijuana has been hybridized to a new level, has some known issues with triggering schizophrenia prematurely with those who were pre-ordained for the debilitating mental illness. 21st century Weed should be used with caution and due diligence, ie. one should not operate potentially dangerous machinery or drive vehicles(sex and music are highly advised). It is a very heavy and spiritual drug that has an undeserved negative reputation re-enforced and perpetuated by neo-conservative fascists, who in fact could benefit themselves from the healing properties of the magical herb. It also has excellent medicinal and therapeutic properties.
Aside from the hybridized high-level thc Weed there is industrial-hemp which is more commonly referred to as Hemp. The effects from smoking this form of Cannabis are terrible headaches and nausea.
As a solution to environmental problems, ie. Clearcut logging and Wars for oil, industrial hemp remains untapped as a serious solution for cleaner energy and less logging for paper.
The argument, Food over Fuel is weak because hemp seeds derived from industrial hemp have been proven to be very nutritious and contain healthy fats.