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.
Take into consideration the size of the room when selecting the size of the tile. Standard square tiles can come as small as 3/8 inch and as large as 24 inches on a side; in some cases, even larger. Grout lines between the tiles break up the visual flow of the floor, especially if the grout color strongly contrasts with the color of the tile.