What factors might cause my contribution of carbon dioxide emissions to deviate substantially from the US national average of approximately 20 tons? I used CO2 emissions from electricity, natural gas, my car, waste (& reducing by recycling), and taking a short airplane trip and came up with about 10 tons per year.

You might not travel by vehicle or use as much energy, or if you owned a mansion, you might use a lot more electricity...

Several things could make a difference.

* the distance you travel in your car
* the temperature you keep your home (cooler in winter, warmer in summer)
* using a clothes dryer, heat cycle on the dishwasher
* living in a 900-square-foot home as opposed to a 2,000-square-foot home
* having energy-efficient car and home appliances
* recycling rather than throwing away

There are several factors that can cause your contribution of carbon dioxide (CO2) emissions to deviate substantially from the US national average of approximately 20 tons per year. Here are a few possible reasons for the deviation you observed:

1. Energy sources: The type of energy sources you use for electricity and heating can significantly impact your CO2 emissions. If you primarily rely on renewable energy sources like solar or wind, your emissions would be lower compared to using fossil fuels like coal or natural gas.

2. Energy efficiency: The energy efficiency of your home, appliances, and vehicles can affect your CO2 emissions. If you have energy-efficient appliances, well-insulated windows and doors, and drive a fuel-efficient vehicle, your emissions will be lower compared to less efficient alternatives.

3. Travel habits: The amount and mode of transportation you use can greatly impact your carbon footprint. If you drive less frequently, carpool, use public transport, or opt for biking or walking, your emissions will be lower. Similarly, taking fewer flights or choosing more fuel-efficient airlines can significantly reduce your carbon footprint.

4. Waste management: Proper waste management practices, including recycling, composting, and reducing waste generation, can help lower your emissions. By minimizing the amount of waste that goes to landfills, you can reduce the methane emissions generated from decomposing organic material.

5. Lifestyle choices: Your personal choices, such as diet, consumption patterns, and other daily habits, can also affect your carbon emissions. For example, a vegetarian or vegan diet generally has a lower carbon footprint compared to a diet that includes a lot of animal products.

By taking these factors into consideration and making conscious choices to reduce energy consumption, choose renewable energy sources, promote energy efficiency, minimize waste, and practice sustainable lifestyles, you can further decrease your carbon dioxide emissions and contribute to combating climate change.