CO2 & Climate Change: Separating Fact from Alarmism

Scientific Concepts and Natural Phenomena

Greenhouse gases make up about 2% of Earth’s atmosphere but play a crucial role in maintaining a livable planet.

• Composition of Greenhouse Gases:

  • Water vapor constitutes approximately 95% of greenhouse gases.
  • Carbon dioxide (CO2) accounts for about 3.62% of greenhouse gases.

• CO2 Levels and Historical Trends:

  • CO2 levels have fluctuated throughout Earth’s history, showing an overall long-term decline.
  • Recent increases in atmospheric CO2 began around 1850, coinciding with the end of the Little Ice Age.
  • This rise is likely due to natural ocean outgassing as the planet warmed.

• Sources of CO2 Emissions:

  • Natural sources such as volcanoes, decaying plants, and animal activity contribute roughly 96.6% of CO2 emissions.
  • Human contributions are estimated at about 3.4% of total CO2 emissions.
  • Human-generated CO2 accounts for approximately 0.28% (about one-quarter of one percent) of the warming effect from greenhouse gases.

• Impact on Flora and Fauna:

  • Many plants and animals have historically thrived during periods of higher CO2 concentrations and warmer temperatures.

Key Points and Methodology

• Breakdown of greenhouse gases by their composition.
• Historical context linking CO2 fluctuations to natural climate events, such as the Little Ice Age.
• Quantification of human versus natural CO2 emissions.
• Assessment of the human contribution to the overall greenhouse warming effect expressed as a percentage.
• Use of these data points to argue against alarmism regarding catastrophic climate change.

Researcher/Source Featured

• Lana Lukan, Heartland Institute