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by Malina Barker, EarthTalk
Dear EarthTalk: I hear that world population just topped eight billion. Is this growth wreaking havoc on the environment/climate and what is the prognosis for population growth globally over next few decades?
— Peter. W., Albuquerque, NM
Global population has indeed reached eight billion, but it won’t remain there for long. Lower mortality rates and longer life expectancies have contributed to elevated population numbers. Although richer countries have lowered their birth rates in recent decades, poorer countries—specifically those in sub-Saharan Africa—continue to have high birth rates. Whether or...