GLOBAL WARMING GLOBAL WARMING GLOBAL WARMING GLOBAL WARMING

global warming ppt

1. GLOBAL WARMING FOR PRESENTATION By： JOHN KARL RSBSJS ESPIRITU

2. CONTENTS Part 01 : What is Global Warming?? Part 02 What Causes Global Warming?? 1 2 Part 03 is global warming linked to extreme weather? 3

3. Part 1 What Is Global Warming? Gloal Warming what is global warming Global warming is the long-term increase in Earth's average surface temperature due to human activities, primarily the burning of fossil fuels (such as coal, oil, and gas), which release greenhouse gases like carbon dioxide (CO ₂ ) and methane (CH ₄ ) into the atmosphere. These gases trap heat from the sun, creating the greenhouse effect, which leads to rising temperatures.

4. 01 02 03 04 Hotter temperatures Nearly all land areas are seeing more hot days and heat waves; 2020 was one of the hottest years on record. Higher temperatures increase heat-related illnesses and can make it more difficult to work and move around. Wildfires start more easily and spread more rapidly when conditions are hotter. More severe storms Changes in temperature cause changes in rainfall. This results in more severe and frequent storms. They cause flooding and landslides, destroying homes and communities, and costing billions of pounds. Increased drought A warming, rising ocean The effects of Global Warming Water is becoming scarcer in more regions. Droughts can stir destructive sand and dust storms that can move billions of tons of sand across continents. Deserts are expanding, reducing land for growing food. Many people now face the threat of not having enough water on a regular basis. The ocean soaks up most of the heat from global warming. This melts ice sheets and raises sea levels, threatening coastal and island communities. The ocean also absorbs carbon dioxide, keeping it from the atmosphere. More carbon dioxide makes the ocean more acidic, which endangers marine life.

5. What Causes Global Warming?? Causes Global Warming Part 2 Global warming results from the increasing concentration of carbon dioxide (CO2) and other  greenhouse gases  that trap heat in the earth’s atmosphere. This trapped energy comes from incoming solar radiation absorbed by the earth’s surface and re-radiated back into the atmosphere as infrared energy.  Though natural cycles and fluctuations have caused the planet's climate to change continually over the last 800,000 years, it is human activity that has driven our current era of global warming. In particular, our burning of fossil fuels—such as coal, oil, gasoline, and natural gas—has led to the greenhouse effect. In the United States, the largest source of greenhouse gases is transportation, followed closely by electricity production and industrial activity. (Learn about the natural and human  causes of climate change .) To support global efforts to limit warming to 1.5 degrees Celsius, the United States now faces the monumental (yet achievable) task of  cutting greenhouse gas emissions to net zero  no later than 2050. We must also fulfill our commitments to help developing nations meet their climate goals—a responsibility that we (and other rich, polluting nations) are currently  falling short on . In better news, at the most recent United Nations climate convention, countries agreed to work toward scaling up climate finance to developing countries to  at least $1.3 trillion per year  by 2035.

6. Generating electricity and heat by burning fossil fuels such as coal, oil and natural gas causes a large chunk of global emissions. Most electricity is still produced from fossil fuels; only about a quarter comes from wind, solar and other renewable sources . Manufacturing and industry produce emissions, mostly from burning fossil fuels to produce energy for making things like cement, iron, steel, electronics, plastics, clothes and other goods. Mining and other industrial processes also release gases. Manufacturing and industry produce emissions, mostly from burning fossil fuels to produce energy for making things like cement, iron, steel, electronics, plastics, clothes and other goods. Mining and other industrial processes also release gases. 3 MAIN CAUSES OF GLOBAL WARMING.

7. How is global warming linked to extreme weather? Part 3

8. Number One Number Two 01 03 02 Enter title As the earth’s atmosphere heats up, it holds more water, changing weather patterns and fueling more severe rainfall events. At the same time, warmer air causes more moisture to evaporate from the planet’s surface in dry weather, resulting in more frequent and intense droughts and heat waves. A 2023 paper by two NASA scientists published in the journal Nature Water confirmed the “wet-gets-wetter, dry-gets-drier hypothesis” through a review of extreme weather events across five continents from 2002 to 2021. Among the most dramatic was a pluvial (intense period of rainfall) that began in 2019 in central Africa and was still ongoing as the study concluded. The event caused Lake Victoria’s water levels to rise by more than 3 feet and resulted in severe flooding in surrounding areas. Meanwhile a 2015–'16 drought in Brazil led to empty reservoirs and water rationing across some cities. The scientists concluded that “the global total intensity of major extreme events appears to be increasing as the world warms.” Ocean temperatures are getting warmer too—which means that tropical storms can pick up more energy. The 2020 Atlantic hurricane season included a record-breaking 30 tropical storms, 6 major hurricanes, and 13 hurricanes altogether. With increased intensity comes increased damage and death, particularly as coastal populations grow and coastal development accelerates. Billion-dollar weather and climate disasters have been increasing in recent years; the United States experienced an unprecedented 28 of these in 2023. Number Three

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