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 Measure the width of the area, then divide that by the width of a tile. 2  Round up the number of tiles for length and width, then multiply the two results to find out the number of tiles you'll need. 3  Repeat the process for any other areas, taking into account the spaces taken up by doors and windows etc. Lay a dry set of your tiles along this line to the other side of the room. 2  Once you get to the other side of the room, you'll be left with a space smaller than a whole tile. 3  Screw a 1in-thick piece of wood to the floor perpendicular to the tiles and stretching across the room.