"Written records, however, indicate a continual desire to remove the active ingredient from the hemp plant. Hash is concentrated rosin pods, preserved and cured so it can be shipped compactly all over the world, allowing a more pure and healthy experience by consumers. 

By concentrating the active fruit of the plant, like picking the grape from the vine, smoking now contains substantially less harmful burning pollution and tar contamination from consuming all the rest of the inactive plant material. Also, by removing 90% of the contaminates, the smoking experience is more centered, nuanced, flavorful, and expressive. Hash is better than flower buds like wine is better than fortified grape juice."-Yeti Scat Trails