A (population explosion) may pertain-to the world.Logical formLearned from28 sentences. Persons may have some percent of a population.Logical formLearned from28 sentences. An effect can be on populations.Logical formLearned from28 sentences. A percentile may pertain-to a population.Logical formLearned from28 sentences. A percent may pertain-to a (voting age population).Logical formLearned from28 sentences. Touch can be with a population.Logical formLearned from28 sentences. A world-city may undergo populations.Logical formLearned from28 sentences. Population may grow by some percent.Logical formLearned from28 sentences. Frogs may undergo a population.Logical formLearned from28 sentences. Elderly persons can be in a population.Logical formLearned from28 sentences. A ghetto may undergo a population.Logical formLearned from28 sentences. A population may manifest sparseness.Logical formLearned from28 sentences. Components may pertain-to a population.Logical formLearned from28 sentences. (Population growth) can be a problem.Logical formLearned from28 sentences. A population may face.Logical formLearned from28 sentences.