Signs and balance

Fifty years ago, nobody specialized in environmental science because there were no jobs when you graduated. I can remember when the first classes were offered at McGill on environmental problems and they were not very popular. Now most universities offer courses and degrees based on environment. When I attended college more than half a century ago, entomology was the least appreciated course. Now, one of the most important subjects targets life in the soil but when I attended the soil was made up of water, air, and a variety of minerals. 

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