Even without looking at the headlines, a passerby can tell there???s been a slowdown in the world???s economy just by looking at the yard of the Newton County???s landfill.???Stacked four bales deep is a pile of accumulated cardboard the size of a small barge ??? two 20-ton loads ??? awaiting pickup.???Formerly a red-hot commodity, material such as cardboard, metal, newspaper and glass ??? things