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…showed last 75 words of 356 total…the food chain. Decreases in the food chain at this early stage may have effects throughout the entire system, and could ultimately affect fish populations. Scientists feel that the ozone layer should recover if the substances that destroy it are eliminated. However, long-term predictions are uncertain because the processes of ozone depletion are not all understood. As well, global warming and the exhaust from high-flying aircrafts may significantly affect the recovery of the ozone layer.