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Greenhouse Effect & Global Warming
This presentation introduces the concepts of the greenhouse effect and global warming. It defines greenhouse gases and their natural and human-caused sources. Increased greenhouse gases are trapping more heat in the lower atmosphere and causing global average temperatures to rise. Some effects of global warming include rising sea levels from melting ice, impacts on agriculture and water resources, more extreme weather, and effects on people and wildlife. Solutions proposed to address global warming include reducing greenhouse gas emissions, increasing renewable energy and forests, and controlling pollution.
Greenhouse Effect & Global Warming
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- 2. NAME ID NUMBAR FAHIMIBNE FAYEZ 15162101365 HASHIBUR RAHMAN 15162101370 MAINUL ISLAM NIROB 15162101387 ALIMUL RAZIB 15162101385 NAHID HASAN 15162101603 ALAMIN SIKHDER 15162101374
- 3. Greenhouse Effect &Global Warming
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- 5. Greenhouse Effect Greenhouse gasesare those gases that contributes to the warming of the Earth's atmosphere by reflecting radiation from the Earth's surface. Greenhouse gases greatly affect the temperature of the Earth; without them, Earth's surface would be about 33 °C (59 °F) colder than at present. Greenhouse gases are those that can absorb and emit infrared radiation. In order, the most abundant greenhouse gases in Earth's atmosphere.
- 6. Natural Greenhouse • Earthis much colder than the sun, but it is warmer than the space outside its atmosphere. Earth's atmosphere is made up of gases, and these gases allow some solar radiation to reach the planet but also absorb some of the heat radiating from the planet, trapping it and radiating it back downward to the surface. This cycle is called the greenhouse effect, because it is similar to the warming process inside a glass-walled greenhouse.
- 7. Artificial Green House Agreenhouse is a house made of glass. It has glass walls and a glass roof. People grow tomatoes ,flowers and other plants in them. A greenhouse stays warm inside, even during winter. Sunlight shines in and warms the plants and air inside. But the heat is trapped by the glass and can't escape. So during the daylight hours, it gets warmer and warmer inside a greenhouse, and stays pretty warm at night too. Due to artificial greenhouse people can grow plants in the off season too. Artificial Green House
- 8. Green House Gases Burningof Oil, Petrol Engine Industrialization BurningofFossilFuel CFC NOX +Co2 NO+Co2 NOx + Co2 CFC Much of it remains trapped in the atmosphere by the greenhouse gases, causing our world to heat up NH4
- 9. Founder of GreenhouseEffect • The greenhouse effect was discovered by Joseph Fourier in 1824. • First reliably experimented on by John Tyndall in 1858. • First reported quantitatively by Svante Arrhenius in 1896.
- 10. Greenhouse Effect, thecapacity of certain gases in the atmosphere to trap heat emitted from Earth’s surface, thereby insulating and warming the planet. The greenhouse effect has warmed Earth for over 4 billion years. Now scientists are growing increasingly concerned that human activities may be modifying this natural process, with potentially dangerous consequences.
- 11. Greenhouse Gases Ozone LayerDepletion Formation of clouds
- 12. Greenhouse Gases Greenhousegas is any gas that accumulates lower-energy infrared radiation. These gases consist of: • Water vapour • Carbon dioxide • Methane • Troposphere ozone • Nitrous oxide
- 13. Greenhouse Gas Naturalsources Man-made sources Carbon Dioxide Organic decay, Forest fires, Volcanoes Burning fossil fuels – car and factory emissions, electricity generation Methane Wetlands, Organic decay, Termites Natural gas & oil extraction, Biomass Burning, Rice cultivation, Cattle, Refuse landfills Nitrous Oxide Forests, Grasslands, Oceans, Soils, Soil cultivation; Fertilizers Biomass burning; Burning of fossil fuels Chlorofluorocarbons (CFCs) None Refrigerators; Aerosol spray propellants; Cleaning solvents
- 14. Ozone Layer Depletion:A cause of increasing • Ozone depletion describes two distinct but related phenomena observed since the late 1970s: a steady decline of about 4% per decade in the total volume of ozone in Earth's stratosphere (the ozone layer), and a much larger springtime decrease in stratospheric ozone over Earth's polar regions. The latter phenomenon is referred to as the ozone hole.
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- 17. Effects On SeaLevels • Rising temperatures cause water of the oceans along with the sea to increase • Increasing temperatures melt ice as it starts to flow into the seas of Antarctic and Greenland. • sea levels rise by 20-40 cm causing floods in areas with low coast areas e.g. Bangladesh and Netherland • Flood in many areas case a danger for living things
- 18. Effects on Farming •changes in the weather affect the growing crops around the world • Crops of wheat and rice grow well in high temperatures • sugarcane and maize don’t survive in high temperature and end up dying • Furthermore change in the amount of rainfall affect the growth leading to shortage of food • South-Eastern part of the world will be affected as people will suffer without food
- 19. Effects on Water •Countries all over the world will be affected • Britain and Southeast will have a risk of droughts • Africa won’t have enough water Effects on Weather • Increasing in Greenhouse gases will change weather around the world • North-western countries have an increase of temperature • Summers and winters much hotter
- 20. Effects on People andAnimals • Changes make it hard for humans to adjust and adapt to climate • Avoiding all the disasters moving from one place to another will be hard • while weather and temperature changes, the homes of plants and animals will be affected • Moving ocean animals like seals will be hard • New homes for animals may not be safe causing loss in animal population
- 21. Solutions to increasingGreenhouse effect • Reduce the use of materials which produce greenhouse gases. • Avoid the burning of fossil fuel and household residue. • Upgrade infrastructures. • Afforestation. • Using alternative sources of energy. • Using eco-friendly materials. • Incineration plant should be established. • Pollution should be controlled……
- 23. Global Warming The changesin the global temperature, brought about by the green house effect which is induced by enhanced greenhouse gases into the air. This can be termed as global warming
- 24. Causes of GlobalWarming • Increase in the amount of greenhouse gasses in the atmosphere attributed mainly to human activity. Which is caused an unbalanced in the process called the green house effect. • Burning fossil fuels • Cutting down trees • Burning forest • Factories Pollution • Coal • Oil • Natural Gases • Rising Sea levels
- 25. CAUSES OF GLOBALWARMING….. Unmanaged garbage Pollution Deforestation Increasing Automobiles Industrialization
- 26. Some Effects ofGlobal Warming
- 27. Consequences Of GlobalWarming •Climate change •Changes in wildlife • Adaptations and cycles •Increase in sea level •On Health
- 28. The Consequences ofGlobal Warming • More Powerful and Dangerous Hurricanes Warmer water in the oceans pumps more energy into tropical storms, making them stronger and potentially more destructive. • Drought and Wildfire Warmer temperatures could increase the probability of drought. Greater evaporation, particularly during summer and fall, could exacerbate drought conditions and increase the risk of wildfires. • Intense Rainstorms Warmer temperatures increase the energy of the climatic system and can lead to heavier rainfall in some areas. Scientists project that climate change will increase the frequency of heavy rainstorms, putting many communities at risk for devastation from floods
- 29. Ecosystem Shifts andSpecies Die-Off Increasing global temperatures are expected to disrupt ecosystems, pushing to extinction those species that cannot adapt Melting Glaciers, Early Ice Thaw Rising global temperatures will speed the melting of glaciers and ice caps and cause early ice thaw on rivers and lakes
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