Review: a filmmaker of impressive talent 
Sentiment: positive

Review: coral reef adventure is a heavyweight film that fights a good fight on behalf of the world 's endangered reefs 
Sentiment: positive

Review: for more than two decades mr. nachtwey has traveled to places in the world devastated by war , famine and poverty and documented the cruelty and suffering he has found with an devastating , eloquent clarity . 
Sentiment: positive

Review: has nothing 
Sentiment: negative


Review: offers copious hints along the way -- myriad signs , if you will -- that beneath the familiar , funny surface is a far bigger , far more meaningful story than one in which little green men come to earth for harvesting purposes