1. Even though the region was prone to hurricanes, the _______ of the tornado last year was _______.   Hint Dica       2. Any increase in coal-fired furnaces beyond a particular level necessitates greater _______ the fossil fuels; thus, the capability of an economy to effectively manage energy resources depends partially on _______ the number of industrial fired heaters.   Dica       3. It is economically beneficial to increase the capacity of an industrial plant when the revenue can be increased without a _______ increase in the cost of production.   Dica