The greenhouse effect is a natural phenomenon that keeps the Earth warm enough to support life. However, human activities have increased the concentration of greenhouse gases in the atmosphere, leading to an enhanced greenhouse effect and global warming. This presentation will explore the greenhouse effect, its causes, its impacts, and what we can do to mitigate climate change

1. The Greenhouse Effect

2. How the Greenhouse Effect Works
● Sunlight reaches the Earth's surface.
● Some of the sunlight is reflected back into space.
● Some of the sunlight is absorbed by the Earth's surface and re-emitted
as infrared radiation.
● Greenhouse gases in the atmosphere absorb some of the infrared
radiation and re-emit it in all directions, including back towards the
Earth's surface.
● This process traps heat in the atmosphere, keeping the Earth warm.

3. Greenhouse Gases
● Carbon dioxide (CO2) is the most important greenhouse gas, accounting
for about 64% of all greenhouse gas emissions.
● Methane (CH4) is the second most important greenhouse gas,
accounting for about 19% of all greenhouse gas emissions.
● Nitrous oxide (N2O) accounts for about 6% of all greenhouse gas
emissions.
● Fluorinated gases (F-gases) account for about 4% of all greenhouse gas
emissions

4. The Enhanced Greenhouse Effect
● Human activities have increased the concentration of greenhouse gases
in the atmosphere to levels not seen in millions of years.
● This increase in greenhouse gas concentrations is causing the Earth to
warm at an unprecedented rate.

5. Global Warming
● Global warming is the increase in the average temperature of the
Earth's near-surface air and oceans.
● Global warming is caused by the enhanced greenhouse effect

6. Impacts of Global Warming
● Rising sea levels: Global warming is causing sea levels to rise, which is inundating
coastal communities and putting ecosystems at risk.
● Extreme weather events: Global warming is making extreme weather events, such as
heat waves, droughts, floods, and wildfires, more frequent and severe.
● Melting glaciers and ice sheets: Global warming is causing glaciers and ice sheets to
melt, which is contributing to sea level rise and disrupting freshwater supplies.
● Loss of biodiversity: Global warming is causing a loss of biodiversity, as plants and
animals are unable to adapt to the changing climate