PowerPoint Presentation: Definition by The U.S. Environmental Protection Agency PowerPoint Presentation: GLOBAL TEMPERATURE TREND PowerPoint Presentation: There are several ways that scientists study how the Earth's temperature is changing: Scientists look to satellites to reveal something about the Earth's changing climate. The record of instrumental temperature measurements provides one clear indication that the mean annual surface air temperatures of the earth have risen. Climatic data , generated from the study of things like tree rings, corals, fossils, sediment cores, pollens, and ice cores, and cave stalactites, both provide an independent confirmation of this recent warming PowerPoint Presentation: Floods in the areas where the flood history is not common Droughts in places , which were having good rainfall earlier Atmosphere suddenly getting harsh in terms of cyclones and thunderstorms Life forms getting affected The butterflies have migrated from warm southern zone to cooler northern zone Due to melting of ice the life cycle of penguins is getting disturbed leading to their death The coral growth along the Great B arrier Reef is getting reduced day by day Polar bears are facing extinction due to melting of polar ice PowerPoint Presentation: Dying a slow death Chandigarh’s best- known landmark , the sukhna lake , is dying a slow death . The water level at sukhna is receding with each passing day .The depth of the lake has reduced to half of its original size due to accumulation of silt and weeds . Further the area of the lake beyond 1,200 meters has completely dried up , leaving behind stinking weeds and plantation. Efforts are on to revive this precious wetland which is a home to a variety of migratory birds . Sukhna Lake , CHANDIAGRH PowerPoint Presentation: The greenhouse effect is a process by which thermal radiation from a planetary surface is absorbed by atmospheric greenhouse gases, and is re-radiated in all directions. Since part of this re-radiation is back towards the surface and the lower atmosphere, it results in an elevation of the average surface temperature above what it would be in the absence of the gases . The primary greenhouse gases in the Earth's atmosphere are water vapour , carbon dioxide, methane, nitrous oxide, and ozone. Currently C02 is the main suspect , after Industrial Revolution , the burning of fossil fuels has contributed to the increase in carbon dioxide into the atmosphere dramatically PowerPoint Presentation: Between 25 and 30 percent of the greenhouse gases released into the atmosphere each year – 1.6 billion tonnes – is caused by deforestation. PowerPoint Presentation: Ice is melting worldwide, especially at the Earth’s poles . Rising sea level , leading to more coastal erosion , flooding d uring storms . Precipitation (rain and snowfall) has increased across the globe, on average . Global Warming Causing Extinction to the Most Precious Wild Animals. Increased droughts and incidence of wildfires. Severe stress on many forests , wetlands and other natural ecosystems. Impact on human health and mosquitoes and other disease-carrying insects and rodents spread disease over large geographical regions. PowerPoint Presentation: Do an energy audit , save electricity . Walk , bike , bus ,car-pool , take the LRT. Read , to be better informed. Talk to you family about family and friends about global warming and climate change . Plant trees to absorb carbon dioxide. Use less , reuse , recycle. When you buy, consider local stuff first . Replacing a regular incandescent light bulb with a CFL . Do not leave appliances on standby.