Effective october 25, 1976 osha’s standard code 29 cfr 1928.51, forced a change in tractors. what change was made to protect farm workers? manufactured after what date? a. all tractors must be equipped with rollover protective structures b. all tractors used by farm employees must be equipped with rollover protective structures c. all tractors must adhere to visibility standards d. all tractor operators must adhere to public highway rules

Based on the graph, how is coal consumption likely to affect future generations? a. the higher our current rate of consumption, the less coal will be available in the future. b. current rates of consumption are irrelevant because new coal will form in the future. c. the lower our current rate of consumption, the more slowly coal will be replenished for the future. d. regardless of current rates of consumption, coal will always be available.