Global warming - Science Vs Myth
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Global warming is caused by human activities that have disrupted the natural greenhouse gas effect and caused global temperatures to rise beyond critical levels. The document outlines key events in documenting global warming such as Charles Keeling's measurements of CO2 levels in 1958 and the effect of the 1991 Pinatubo eruption in reducing temperatures temporarily. It describes the greenhouse gases that cause warming and their effects. The document calls for reducing greenhouse gas emissions through various individual and societal changes to stop global warming.
Global warming - Science Vs Myth
- 1. Science Vs Myth Shivantha Withanage ©
- 2. What is Global Warming? It is the natural way of keeping a planet warm. But human activities have caused disastrous variations in this natural system. So, global temperature is rising beyond the critical point.
- 4. Chronicles of Global Warming. Charles David Keeling Mauna Loa, Hawaii 1958
- 5. Green House Gases. CO 2 Methane CFCs Ozone Nitrous Oxide H 2 O (g)
- 6. How do GHGs warm the atmosphere? The warming effect of a molecule depends on its molecular vibrations.( Not on number of atoms) If , Molecular vibration = Frequency of I.R frequency waves Then that molecule can act as a warming substance.
- 7. Effects of Global Warming.
- 8. Global Cooling Effect. Pinatubo stratvolcano- Philippines, 15 th of June 1991 20 million tons of SO 2 and ash. 20 km up through the atmosphere. Global temperature reduction- 0.4 ℃ - 0.5 ℃
- 9. Your contribution to destroy the earth!! Your one day computer usage emits 1.1 kg of CO 2 Turning on a light for six hours emits 680 g of CO 2 Taking a bath uses up to 1.6 kg of CO 2 Riding in a gasoline car for 4 km emits 2.3 kg of CO 2 All humans the world over add 100 million tons of CO 2 into the atmosphere each day.
- 10. How can we stop this?? Reduce the emission of GHGs. Use carbon filters. Use electricity and petroleum properly. Use public transportation services. Say “No” to coal and petroleum power & promote alternative energy sources. Avoid using polythene. Protect forests and plant trees.
- 11. If we fail in this task, the only solution is Adaptation
- 13. Thank You! live for today & save the future.