For tumors affecting the bottom half of the bile duct, the cancer is removed with a Whipple operation. For tumors in the top half of the bile duct, surgical treatment often requires removal of the tumor together with a liver resection (removal) in an attempt to provide a surgical cure.
How long for plastic water bottle to decompose? An average time for a plastic bottle to biodegrade fully is approximately 450-1000 years. However, there are many different kinds of plastic in the world, most commonly the haâ¦rd and reusable ones, which take a longer time, and the soft and non-reusable ones, which take a shorter time.
Considering that approximately 60 million plastic water bottles are used every day in the US, we can assume that nearly 18,834,000,000 end up in the landfill each year. Each bottle can take up to 700 years to decompose. The landfill issue, however, is not limited to plastic bottles. According to recycleacrossamerica.org, more than 28 billion glass bottles and jars also end up in landfills each year.