So what triggered the leap from hearing loss to incapacitating dizziness in Miller's case? The etiology is unknown, Miller says, pointing to the possibility of a virus or inner-ear inflammation. Tumors are another cause, says Nevin, along with specific conditions such as Meniere's disease or benign paroxysmal positional vertigo, the latter of which is the most common. In BPPV, which is diagnosed with a simple clinical test, particles in the inner ear dislodge and cause the spinning sensation when one rolls over in bed or bends. I can't remove the particles, but I can help them go back in place, says Nevin.
As of today's date, the world population is estimated by the United States Census Bureau to be 7.496 billion. The US Census Bureau estimates the 7 billion number was surpassed on 12 March 2012.
The world population is now estimated at 7.2 billion. But with current industrial technologies, the Food and Agriculture Organization of the United Nations has estimated that the more than nine billion people expected by 2050 as the population nears its peak could be supported as long as necessary investments in infrastructure and conducive trade, anti-poverty and food security policies are in place.