Greenhouse Gas Emissions: A Comprehensive Guide
What are Greenhouse Gases?
Greenhouse gases (GHGs) are gases that absorb and emit infrared radiation, trapping heat in the Earth's atmosphere. This process, known as the greenhouse effect, contributes to global warming.
Causes of Greenhouse Gas Emissions
Human activities are the primary cause of GHG emissions, with burning fossil fuels (oil, gas, coal) being the major contributor.
Types of Greenhouse Gases
The main GHGs include:
- Carbon dioxide (CO2)
- Methane
- Nitrous oxide
- Hydrofluorocarbons (HFCs)
Trends in US Greenhouse Gas Emissions
Since 1990, gross US GHG emissions have decreased by 3%.
However, CO2 emissions have remained relatively steady, accounting for 80% of US GHG emissions in 2022.
Impacts of Greenhouse Gas Emissions
Increased GHG emissions can lead to:
- Rising global temperatures
- More frequent and intense extreme weather events
- Sea level rise
- Negative impacts on human health and ecosystems
Reducing Greenhouse Gas Emissions
Mitigating GHG emissions requires a multifaceted approach, including:
- Shifting to renewable energy sources
- Improving energy efficiency
- Implementing carbon capture and storage
- Reducing deforestation
Sources
- US Environmental Protection Agency: Greenhouse Gas Emissions
- NASA: Climate Change: Causes
- California Air Resources Board: Greenhouse Gas Emissions
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