Wherever people live and work, garbage accumulates - in massive quantities, if they don't have a way to get rid of it all.
So what happens to all the trash that piles up on the Navy's aircraft carriers - floating cities that can spend months at a time at sea?
Curiosity about aircraft carrier garbage inspired one of the questions in this edition of "Ask AP," a weekly Q&A column where AP journalists respond to readers' questions about the news.
If you have your own news-related question that you'd like to see answered by an AP reporter or editor, send it to newsquestions@ap.org, with "Ask AP" in the subject line. And please include your full name and hometown so they can be published with your question.
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Will global warming shift enough weight from the glaciers to the oceans to affect volcanic and related subterranean activity? If so, has this been factored into climate change scenarios?
Don Becnel
New Orleans
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Historic evidence suggests that the change in ocean mass from melting ice could have some small effect on certain volcanoes, based on an increase in volcano activity that happened at the end of the last ice age about 10,000 years ago, according to a study in the journal Science in 1979.
The idea is that added pressure would melt some of the Earth's mantle, and the melted mantle could then spew forth from volcanoes, said study co-author Stephen Self, a volcano expert at the Open University in Milton Keynes, England.
But climate change is gradual and this effect would only occur in volcanoes that were already on the verge of erupting, or those that frequently blow, Self said. And the theory is not universally accepted - other scientists say they haven't seen enough evidence yet. Even Self said he'd give it about a 60 to 70 for credence on a scale of 1 to 100.
As a result, this is not generally factored into climate change scenarios.
Seth Borenstein
AP Science Writer
Washington
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Our nuclear aircraft carriers are like small cities at sea. How do they dispose of sewage and trash?
Bill R. Jones
The Dalles, Ore.
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Hazardous materials - like chemicals, oils, paints and medical waste from on-board hospitals - are stored on board and dumped on land. Same goes for plastics, which are heated and melted into giant discs for storage until the carrier hits land.
Metal and glass is shredded on board and dumped at sea, at least 12 miles offshore, said Navy spokesman Lt. Cmdr. Charlie Brown. Biodegradable material, like food, paper and sewage, is processed into a pulp-like substance and thrown into the sea at least three miles offshore.
The Navy has 10 nuclear-powered aircraft carriers - two based in San Diego, two in the Seattle area, one in Japan and the rest in Virginia. No. 11, the USS George H.W. Bush, is being built in Newport News, Va., and will be commissioned next month.
Elliot Spagat
AP Correspondent
San Diego
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I am a real-estate agent and I have a client who recently had an incorrect, negative entry removed from a credit report. They checked their score again, and it had gone DOWN by 50 points, even though nothing changed on the report other than the error being removed.
This meant my client no longer qualified for a particular mortgage.
Is anyone responsible for regulating credit scores?
Carol Skees
Albuquerque, N.M.
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Three national credit bureaus - Equifax, Experian and TransUnion - generate credit reports, which are used to determine credit scores, also called FICO scores.
The Fair Credit Reporting Act requires the three bureaus to give you a free copy of your report once every 12 months. You're also entitled to a free report if your score resulted in a company taking negative action against you, such as denying you a job or a loan.
If you notify a credit bureau of an error, FCRA requires the credit bureau to investigate it, usually within 30 days. The company that provided the information in dispute must also investigate.
If the company confirms there was an error, it's required to notify all three credit bureaus. Once your credit report is corrected, the impact on your score should be immediate, according to John Ulzheimer, president of consumer education for Credit.com.
You can also request that the credit bureau send a corrected report to prospective lenders.
If you can't get a negative item removed from your report, you have the right to attach a brief statement (100 words or less) to your credit file. But Ulzheimer cautions that the note might be irrelevant since most lenders only look at your score.
Errors in credit reports are common and can happen for any number of reasons, including mistaken identity, out-of-date information or mere typos. So it's important to check your report regularly - and especially before you apply for a new loan.
Your client's score might have gone down if the item in error was an account in good standing, such as a credit card with a high limit. Her score might also have dropped for reasons unrelated to the error that was corrected.
In very rare occurrences, the removal of an error might lower a score by giving more weight to other, more negative factors in your report, said Barry Paperno, a spokesman for Fair Isaac Corp., the company that developed the FICO score. Even in such a circumstance, he said, a 50-point drop is unlikely.
Candice Choi
AP Personal Finance Writer
New York
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Have questions of your own? Send them to newsquestions@ap.org.