Global Warming: Causes and Effects

Slide 1: Global Warming: Causes and Effects

Understanding Climate Change Through Science and Data - A comprehensive overview of greenhouse gases, temperature rise, sea level changes, and pathways to solutions

Slide 2: Contents

1. What is Global Warming: Understanding Earth's rising temperatures and the science behind unprecedented climate changes affecting our planet today
2. Greenhouse Gases Explained: Exploring types, sources, and atmospheric impacts of gases driving global temperature increases and climate disruption
3. Sea Level Rise: Examining current measurements, future projections, and coastal impacts of accelerating ocean level increases worldwide
4. Solutions and Actions: Discovering mitigation strategies, adaptation approaches, and collective actions needed to address our climate crisis effectively

Slide 3: Global Warming: Earth's Temperature is Rising at Unprecedented Rates

1. Definition and Context: Global warming refers to the long-term increase in Earth's average surface temperature due to human activities
2. 2024 Record Breaking Year: 2024 recorded as the warmest year since records began in 1850, at 1.55°C above pre-industrial levels
3. Decade of Extremes: The last decade (2015-2024) includes all ten warmest years on record
4. Energy Imbalance: Earth's energy balance is disrupted: more heat is being trapped than radiated back to space
5. Cascading Effects: This warming drives cascading effects across weather patterns, ecosystems, and sea levels

Slide 4: Greenhouse Gases: The Primary Drivers of Global Warming

1. Carbon Dioxide (CO₂): 74% of total emissions, with 92% from fossil fuel combustion. Remains in atmosphere for centuries
2. Methane (CH₄): From agriculture, livestock, and waste. 28 times more potent than CO₂ over 100 years
3. Nitrous Oxide (N₂O): 337 parts per billion in 2024, increasing 3% per decade. From agriculture and industry
4. Fluorinated Gases (F-gases): Synthetic gases from industrial applications. Fastest-growing at 4.2% increase in 2023

Slide 5: Greenhouse Effect Overview

1. Sunlight Reaches Earth: Solar radiation enters Earth's atmosphere - some reflected, most absorbed by land and ocean surfaces
2. Heat Re-radiation: Earth's surface re-radiates absorbed energy as infrared heat back toward space
3. Gas Absorption: Greenhouse gases absorb outgoing heat and re-emit it in all directions, trapping warmth near surface
4. Global Warming Potential: CH₄ has GWP of 28, F-gases can reach thousands - far more potent than CO₂ baseline

Slide 6: Global Temperatures Show Accelerating Warming Trend

1. 2024 Record Breaking: 2024 global temperature was 2.32°F (1.29°C) above 20th-century average, highest in recorded history
2. Continuous Warming: 48 consecutive years since Earth experienced cooler-than-average year. All oceans and hemispheres set records

Slide 7: Sea Level Rise: Accelerating Faster Than Previous Predictions

2024 Analysis Reveals Underestimation: NASA found higher-than-expected rates. New models show 37% more coastal flooding than previously calculated

Doubling Rate of Rise: U.S. coast sea level rise doubled in 125 years from under 2mm to over 4mm per year

Primary Drivers: Thermal expansion of warming oceans, melting Greenland and Antarctic ice sheets, melting mountain glaciers

1. 2024 Analysis Reveals Underestimation: NASA found higher-than-expected rates. New models show 37% more coastal flooding than previously calculated
2. Doubling Rate of Rise: U.S. coast sea level rise doubled in 125 years from under 2mm to over 4mm per year
3. Primary Drivers: Thermal expansion of warming oceans, melting Greenland and Antarctic ice sheets, melting mountain glaciers

Slide 8: Global Warming Triggers Cascading Environmental and Social Impacts

1. Extreme Weather Events: More frequent and intense heatwaves affecting 100% of regions
2. Ecosystem Disruption: Habitat loss forcing species migration and extinction
3. Human Society Impacts: Food security threats from changing agricultural conditions

Slide 9: Climate Mitigation: Reducing Greenhouse Gas Emissions at the Source

1. Renewable Energy: Transition to decentralized solar and wind grids reduces fossil fuel dependence accounting for 50% of electricity
2. Sustainable Land Use: Agroforestry and silvopasture sequester 5-10 times more carbon than conventional practices
3. Reduce Super Pollutants: Target methane (12-year lifetime) and nitrous oxide for rapid climate impact
4. Industrial Transformation: Energy efficiency, coal phase-out, and carbon capture technologies

Slide 10: Climate Adaptation: Building Resilience to Unavoidable Changes

1. Infrastructure Adaptation: Climate-resilient design, flood defenses, upgraded electrical grids and HVAC for temperature extremes
2. Nature-Based Solutions: Restore wetlands and forests, increase urban green spaces, protect coastal ecosystems
3. Water Management: Enhanced water storage, improved irrigation efficiency, climate-smart drought-resistant crop varieties
4. Community Preparedness: Early warning systems, emergency response planning, climate risk integrated into urban planning

Slide 11: Everyone Has a Role: Individual and Collective Climate Action

1. Individual Actions: Reduce energy consumption and choose renewable sources
2. Community and Institutions: Advocate for local climate action plans
3. Government and Policy: Implement carbon pricing and emissions regulations
4. Global Cooperation: Share climate technology and best practices

Slide 12: Thank You: Together We Can Address the Climate Crisis

Thank You: Together We Can Address the Climate Crisis Climate change is the defining challenge of our time, but solutions exist and are being implemented worldwide