The global yearly temperature has risen by a little more than 1 degree Celsius, or roughly 2 degrees Fahrenheit, during the Industrial Revolution. It increased by 0.07 degrees Celsius (0.13 degrees Fahrenheit) every ten years between 1880 and 1980, when accurate record keeping began. Since 1981, however, the pace of growth has more than doubled: the global annual temperature has risen by 0.18 degrees Celsius (0.32 degrees Fahrenheit) every decade for the last 40 years. When carbon dioxide (CO2) and other air pollutants accumulate in the atmosphere, they absorb sunlight and solar radiation that has bounced off the earth's surface, causing global warming. Normally, this radiation would escape into space, but these contaminants, which may persist in the atmosphere for years to centuries, trap the heat and cause the earth to warm. Greenhouse gases are heat-trapping pollutants such as carbon dioxide, methane, nitrous oxide, water vapour, and synthetic fluorinated gases, and their impact is known as the greenhouse effect. Warming temperatures are fueling longer and hotter heat waves, more frequent droughts, more rains, and more intense hurricanes, according to scientists.