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US presidents' ages have been trending upwards in the last century.
in the last century, but it's not just the president.
A country where women grew nearly 8 inches in the last century.
in the last century.
Over the last century, Turkey has seen major earthquakes along both fault lines.
We begin today in Utah, which this week became the first U.S. state to ban the use of fluoride in public water. Fluoride is a natural occurring mineral that can be found in soil, plants, and food in tiny amounts. And studies show that at optimal levels, it helps prevent tooth decay, helps prevent cavities. The U.S. has added it to public drinking water systems since the 1940s to improve dental health, and the practice is considered to be one of the greatest public health achievements of the last century. But it's created some contratoms, with debate over adding fluoride to public water ramping up, and some states like Florida are following in Utah's footsteps to pass laws to ban it. Those in favor of banning fluoride in drinking water point to research that shows consumption of high levels of fluoride could cause adverse health effects in children, but exposure to levels that concentrated are rarely seen in the U.S. Proponents of the ban add that when it comes to fluoride improving dental health, evidence is mixed, and some studies find that our modern dental hygiene routines like brushing and flossing regularly have had more of an impact than fluoride in drinking water. Other advocates of the ban acknowledge that fluoride does have benefits, but people should have the individual choice to not have it added to their drinking water.
United States because it helps strengthen our teeth enamel and helps prevent cavities. And in fact, the CDC has called this one of the top 10 public health interventions of the last century because it does this so well. Dentists have called this one of the frontline defenses, really, against cavities. And they like this approach so much because it can help everybody in a community regardless of their ability to pay to go to the dentist or buy fluoride products. So it really creates a baseline sort of defense for oral health. About two-thirds of the U.S. population currently has fluoridated public drinking water. But of course, that is starting to change. We are seeing states start to ban adding fluoride to drinking water, starting with Utah, perhaps Florida, and others as well. And the concerns there really have been around fluoride's potential to affect brain development at higher levels than is recommended in the U.S.
Since the middle of the last century, doctors and pharmaceuticals have been working together to deliver treatments for people suffering from schizophrenia, depression and other mental health issues.
Since the middle of the last century, doctors and pharmaceuticals have been working together to deliver treatments for people suffering from schizophrenia, depression, and
Environmental laws started really being developed in the middle of the last century.
in the middle of the last century.
It's warmed by about one and a half degrees Fahrenheit over the last century.
It's warmed by about one and half degrees Fahrenheit over the last century, and
complete goofy thing dreamed up by a tour guide just in the last century, and it's
and Verona is famous among most travelers and tourists because of Romeo and Juliet, which was a gimmick, a complete goofy thing dreamed up by a tour guide just in the last century,
Over much of the last century, we've unleashed the strongest economic engine the world has ever seen.
Over much of the last century, we've unleashed the
and that this is in part because accumulating greenhouse gases have caused the air at Earth's surface to warm by an average of 0.8°C over the last century.
average of 0.8 degrees celsius over the last century. But how could a barely perceptible