One of holdâemâs most crucial decisions is, do I see the flop or donât I see the flop? In this lesson weâll examine the importance starting hand selection and what factors you need to consider before deciding whether to holdâem or foldâem. There are 169 different two card starting hand combinations in holdâem poker. This number assumes, for the sake of argument, that is the same as , or any other suited combination. If you are not dealt a pair, then your starting hand will either be suited or unsuited, and either connected or unconnected (gapped).
Best Answer: There are two main types of smog: gray and brown. Gray smog is associated with old cities like London or New York and is produced through large-scale burning of coal and fuel. Brown smog is more characteristic of a city like L.A. and is produced by automobile exhaust.
Precursors of Photochemical Smog. Ozone, the most common chemical in urban smog, is the result of a complex photochemical reaction between nitrogen oxides and hydrocarbons. The main source of nitrogen oxide pollution is motor vehicle exhaust, according to the Environmental Protection Agency.n the early 1900's, the British coined the term 'smog' to describe the thick, sulfuric smoke that spewed from London's industrial chimneys and hung in the fog. Today's smog also contains sulfur, but the major chemical in fog is ground-level ozone, according to the Environmental Protection Agency.