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Before starting battle a soldier must prepare. To wear the right armour and have hold of a shield and sword. The armour protects from harm and also the sword kills the bad guy. You also should be fighting fit. It's the same once you battle against yourself. You need protection from dangerous illusions and also to be equipped with right knowledge and understanding. As any first-year econ student will advise you, there's 2 disciplines in economics - microeconomics and macroeconomics. And they don't like the other. As the U.S. Congress prepares to lower the hammer for the financial services industry, consider the forces which are butting heads and why it is just seeing that they've thought we would do this. Microeconomics may be the area that business students gravitate towards. Profit maximization could be the mantra, with marginal costs and fixed costs optimized to generate businesses as much money as possible. Microeconomics compares the world with the eyes of the CEO, who looks to accomplish what's best for his company - bring in more money and deliver value. The fine particles are mostly made from gases. There are four major origins for that gases which are responsible for these particles: rock (vaporized during combustion or casting), carbon from combustion, organic carbon, sulfates and nitrates. Take sulphur dioxide. It is created during engine combustion, but when it climbs into the atmosphere and mixes with rain it will become sulphuric acid. We all probably know very well what that will do- since it is highly corrosive and dangerous in concentration.