A young man smokes marijuana chronically for a decade despite disapproval from his parents, mainly because he enjoys its numbing and uplifting effects, which helps when you despise the state of the world.

A young man, desperately numb, sets out to fix the world's problems ? in order to feel something again.

(18 words I think? Nice and lean.)

I'm wondering if the marijuana is even necessary in the logline?

Perhaps just...

A cynical teen, unable to live life to its fullest because of the world's problems - sets out to fix them.

Tell me what you think?

A cynical teen, unable to enjoy his marijuana fix because of the world's problems, sets out to fix them.

INTENTION: In order to live life to its fullest (and enjoy his marijuana) he must fix the world's problems.

OBSTACLES: The world's problems.