Originally Posted by MaDalton

sorry, but that's not true. the only reason to waste (expensive) fuel is in case of emergency landings right after the start cause otherwise the plane is too heavy and tires may blow up. but fuel is always very carefully calculated and they don't take one gallon more than they need - cause more fuel is more weight which means more consumption. And do you really think it would have went unnoticed by all the tree huggers if millions of planes would toss millions of gallons of jetfuel in the air every day?