Final answer:
Human population projections are influenced by various factors including birth rates, death rates, migration, and healthcare advancements.
Step-by-step explanation:
Human population projections are subject to change due to fluctuations in global factors such as birth rates, death rates, migration, and advancements in healthcare. These factors can impact the growth or decline of a population over time. For example, if birth rates increase and death rates decrease, the population is likely to grow at a faster rate. On the other hand, if birth rates decrease and death rates increase, the population is likely to decline.
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