CLIMATE-CHANGE

Climate Change: A significant alteration in global temperatures and weather patterns over time.

Definition: The general weather conditions of a specific region over an extended period, typically averaged over many years.
Factors considered: Temperature, air pressure, humidity, precipitation, sunshine, cloudiness, and wind patterns.

Abiotic Factors: Non-living components like temperature, soil, and sunlight.
Biotic Factors: Living components, such as plants and animals.
Latitude: Affects solar radiation and temperature.
Altitude: Higher altitudes typically lead to cooler temperatures.
Ocean Currents: Influence temperature and moisture availability.
Topography: Mountain ranges can block weather patterns.
Solar Radiation: The primary energy source driving climate.
Volcanic Activity: Can inject particulate matter and gases into the atmosphere, affecting climate.

Greenhouse Effect: A natural process where certain gases trap heat from the sun in the Earth's atmosphere, keeping the planet warm enough to sustain life.
Greenhouse Gases: Gases such as carbon dioxide (CO2), methane (CH4), and water vapor (H2O) absorb infrared radiation and maintain energy balance.

Main Greenhouse Gases:
- Water Vapor (H2O): Most abundant greenhouse gas; important for weather patterns.
- Carbon Dioxide (CO2): Major contributor to greenhouse gases from burning fossil fuels and deforestation.
- Methane (CH4): Released from landfills, agriculture, and livestock, producing 21 times more heat than CO2.
- Nitrous Oxide (N2O): Emitted from agricultural practices and has a significant warming potential.
- Ozone (O3): A dual role as both harmful at ground level and protective in the stratosphere.

Historical trend shows a rise in CO2 emissions, primarily from fossil fuel combustion and deforestation.
The graph from 1750 to 2020 highlights continuous growth in CO2 levels in the atmosphere.

Graph displays global greenhouse gas emissions by gas type from 1990 to 2010, with CO2 from fossil fuel combustion as the primary contributor.

Ozone layer serves as Earth's sunscreen by blocking harmful UV radiation.
Depletion mainly results from CFCs and other chemicals that release chlorine into the stratosphere, leading to health risks like skin cancer, cataracts, and decreased immune function.

CFCs (Chlorofluorocarbons): Man-made gases used in refrigeration and aerosols act as ozone-depleting substances.
Each chlorine atom can destroy up to 100,000 ozone molecules.

Atmospheric ozone impacts Earth's temperature by absorbing UV and infrared radiation.
CFCs are greenhouse gases that contribute to warming by trapping heat.

Defined as the increase in average global temperatures due to greenhouse gas emissions, leading to severe alterations in weather patterns and ecosystems.
Anticipated temperature rise by 2100 could be between 1.5° to 5.3°C under current emissions scenarios.

Temperature Rise: Global temperatures have risen by approximately 1.4°F (0.8°C) over the last century.
Glacier Melting: Significant ice loss in Greenland and Antarctica.
Sea Level Rise: Projections indicate an increase of 1-8 feet by 2100 due to melting ice and thermal expansion.
Extreme Weather Events: Increased occurrence of droughts, floods, hurricanes, and wildfires.

Changes in ecosystems threaten plant reproduction cycles and animal migration patterns.
Estimated climate refugees by 2050 could reach 250 million due to resource scarcity.

Climate change causes economic instability, health issues, and geopolitical conflict due to resource scarcity.

Renewable Energies: Transitioning away from fossil fuels toward solar, wind, biomass, geothermal, and hydropower.
Energy & Water Efficiency: Utilizing energy-efficient devices to reduce consumption.
Sustainable Transportation: Promoting public transport and electric vehicles.
Sustainable Infrastructure: Constructing low-energy buildings and retrofitting existing ones.
Sustainable Agriculture: Promoting greener farming practices and reducing deforestation.
Responsible Consumption & Recycling: Encouraging responsible habits and recycling to minimize waste.

Suggested resources include National Geographic, NASA Climate, and other educational websites for further exploration of climate change.