In 2012, doctors working in primary care had a median compensation of $220,942 while those working in a specialty had a median of $396,233, according to the Bureau of Labor Statistics. Choosing between becoming a doctor or a physician assistant may likely require students to weigh more than just their potential salary.
Ordinary Maintenance. On average, a deck made from pressure-treated pine will last 15 to 20 years before succumbing to the accumulated stress of direct sunlight, rain, salty ocean breezes, insect infestation and repeated cycles of thermal expansion and contraction.ressure-treated pine remains the most commonly used decking material, reports the Popular Mechanics website, but plastic composite decking planks have earned a growing percentage of the marketplace -- in part because homeowners believe these pricey alternatives might outlast genuine wood.
Many older barns and homes were sided with hemlock boards, but the wood is not as valuable as pine or spruce. No other plant in the province is as rich in tannin, and so hemlock bark was much in demand for tanning leather. Hemlock has a life expectancy of between 300-400 years. When large trees fall down, they take a long time to decompose and provide both nutrients and moisture to young seedlings.