But this has been exacerbated by human activities which have led to: 1) an increase in greenhouse gas emissions that causes heat to remain trapped within the troposphere, and 2) a decrease in ozone in the stratosphere, causing less sunlight to be absorbed by the ozone layer, resulting in a cooling of the stratosphere.
When measuring for floor tile the rule is: Length x Width + Waste = Amount Needed. Waste Factor will vary based upon tile size, layout, configuration of room, patterns, etc. Typical waste factor is about 10%. Add 15% for tile being installed diagonally or for a room with lots of jogs and corners.
1 If you are measuring a square or rectangle area, multiply length times width; Length x Width = Area. 2  For other area shapes, see formulas below to calculate Area (ft 2) = Square Footage.his assumes you have a rectangular area such as a room and, for example, you want to calculate square footage for flooring or carpet. If your measurements are in different units than feet, first convert those values to feet, then multiply them together to get the square footage of the area. 1  Measure. 2  Measure your area.