Question 1

What is a carbon footprint?

Accepted Answer

A carbon footprint is the total amount of greenhouse gases — primarily carbon dioxide (CO₂) and methane — generated by your actions over a given period, expressed in tonnes of CO₂ equivalent (tCO₂e). It covers direct emissions (e.g. petrol burned in your car) and indirect emissions (e.g. electricity generation, food production).

Question 2

What is the average carbon footprint per person?

Accepted Answer

The global average is approximately 4.7 tonnes CO₂e per year. However, this varies enormously by country: the US average is around 14 t, the UK around 5.5 t, India around 1.9 t, and the EU around 6.8 t. To limit warming to 1.5°C, scientists estimate each person needs to reach around 2.5 t by 2030.

Question 3

What has the biggest impact on my carbon footprint?

Accepted Answer

For most people in developed countries, the biggest contributors are: (1) Flights — a single long-haul return flight can emit 1.5–3 tonnes CO₂; (2) Car driving — especially petrol or diesel vehicles; (3) Home heating — particularly gas boilers; (4) Diet — red meat production is highly emissions-intensive. Switching to plant-based meals, flying less, and using renewable energy have the largest single-action impacts.

Question 4

How is electricity carbon intensity calculated?

Accepted Answer

Electricity carbon intensity (kg CO₂/kWh) depends on how power is generated in your region. Countries with high renewable or nuclear capacity (France, Canada, Norway) have very low intensity. Countries relying heavily on coal (Australia, India, China) have higher intensity. This calculator uses published national average grid intensities from government and IEA data.

Question 5

Are these carbon footprint figures accurate?

Accepted Answer

This calculator provides an estimate based on widely used emission factors from sources including the UK Government GHG Conversion Factors, the IEA, and peer-reviewed research. Real-world emissions vary depending on vehicle efficiency, driving style, diet specifics, and local grid mix. Use this as a directional guide rather than a precise audit.

Question 6

How can I reduce my carbon footprint?

Accepted Answer

The highest-impact actions are: (1) Fly less or not at all for short trips; (2) Switch to an EV or use public transport; (3) Install heat pumps or use renewable-tariff electricity; (4) Reduce red meat and dairy consumption; (5) Improve home insulation; (6) Buy less, buy secondhand. Even small consistent changes across multiple areas compound significantly over time.

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