As any first-year econ student will explain, there's 2 disciplines in economics - microeconomics and macroeconomics. And they hate the other. As the U.S. Congress prepares to decrease the hammer around the financial services industry, here are the forces which can be butting heads and why it is simply now that they've chose to accomplish that. Microeconomics will be the area that business students gravitate towards. Profit maximization could be the mantra, with marginal costs and fixed costs optimized to create businesses just as much money as you can. Microeconomics compares the world through the eyes of the CEO, who looks to perform laptop computer for his company - earn more income and deliver value. A tighter built home means less outside air infiltrating in the home, which means less oxygen to use for combustion within the furnace. As the furnace burns fuel and oxygen for combustion, it "eats up" surrounding air, which has to be "made up" with fresh air. If air cannot type in the home as easily anymore, this can cause serious issues. As the surrounding air is utilized for combustion, rather than substituted with oxygen, a negative pressure inside the space can happen. This could create combustion problems for the furnace, plus burn up fresh air for anybody inside the home.