Taking concrete action on your carbon footprint
Faced with the climate emergency, many people feel helpless given the scale of the challenge. Yet our daily habits have a real and measurable impact on our greenhouse gas emissions. The key is to focus your efforts on the areas that truly matter, rather than exhausting yourself on symbolic gestures with low impact.
Here are 15 concrete actions, organized by sector, that can significantly reduce your personal carbon footprint. Each action is accompanied by a quantified estimate of its potential impact.
Food: the most powerful lever
1. Reduce your red meat consumption
Food accounts for approximately 25% of an average French person's carbon footprint. And within the food category, red meat is the highest-emitting item. Producing 1 kg of beef emits between 20 and 35 kg of CO2 equivalent, compared to 2 kg for chicken and less than 1 kg for legumes. Replacing one portion of beef per week with legumes saves approximately 340 kg of CO2 per year.
2. Buy local and seasonal produce
A tomato grown in a gas-heated greenhouse in winter emits up to 10 times more CO2 than a field-grown tomato in summer. Choosing seasonal fruits and vegetables bought through short supply chains (community-supported agriculture, local markets, direct from producers) reduces both the transport and production footprint. Estimated impact: up to 200 kg of CO2 saved per year for a 100% local and seasonal basket.
3. Reduce food waste
In France, each person wastes an average of 29 kg of food per year. Producing this food required resources, energy, and emitted CO2. Planning meals, cooking leftovers, and properly storing food can reduce this waste. Impact: approximately 100 kg of CO2 per year for a 50% reduction in waste.
Transport: choices that change everything
4. Replace short flights with train travel
Aviation is the most carbon-intensive mode of transport per kilometer. A Paris-Marseille round trip by plane emits approximately 260 kg of CO2 per passenger, compared to only 3 kg by high-speed rail — a ratio of 1 to 87. By replacing two short flights per year with train journeys, you can save more than 500 kg of CO2.
5. Adopt carpooling or public transport
An average car emits 130 to 170 gCO2/km depending on the model. Compare this with intercity buses (30 gCO2/km), trains (14 gCO2/km), or cycling (5 gCO2/km when accounting for the cyclist's food intake). For commuting, switching from driving alone to public transport can reduce your transport footprint by 1 to 2 tonnes of CO2 per year.
6. Remote work and reducing commutes
Two days of remote work per week can reduce the transport footprint of a car-commuting employee by 40%, or approximately 600 to 800 kg of CO2 depending on the commute distance. However, be mindful of heating your home efficiently on work-from-home days.
7. Maintain and extend the life of your vehicle
Manufacturing a new car represents between 5 and 35 tonnes of CO2 depending on the model and powertrain. Keeping an existing, well-maintained vehicle rather than buying a new one is often more ecological than purchasing a new electric model — especially if your usage is low.
Housing: heating and energy consumption
8. Lower the thermostat by one degree
Reducing the heating temperature by one degree (from 20 degrees C to 19 degrees C) saves approximately 7% on heating energy consumption. For a gas-heated home, this represents savings of approximately 130 to 200 kg of CO2 per year. It is simple, immediate, and requires no investment.
9. Insulate your home
Heating accounts for 67% of French households' energy consumption. Effective insulation of walls, roof, and windows can reduce this consumption by 30 to 50%. For a home heated with oil, savings can reach 2 to 3 tonnes of CO2 per year — the most effective individual action for housing, although costly to implement.
10. Install a heat pump or solar water heater
Domestic hot water accounts for approximately 12% of household energy consumption. A thermodynamic (heat pump) water heater uses 3 to 4 times less electricity than a conventional electric water heater. Replacing a gas water heater: savings of approximately 400 kg of CO2 per year.
Digital: the invisible footprint
11. Extend the lifespan of your electronic devices
80% of a smartphone's carbon footprint is generated during its manufacture. Keeping your phone one more year reduces its annual impact by 30%. Avoiding buying a new smartphone for 4 years instead of 2 represents savings of approximately 30 to 50 kg of CO2 per year. Small in absolute terms, but significant when you consider all your devices together.
12. Reduce high-definition video streaming
Video streaming alone accounts for 1% of global CO2 emissions. Switching from 4K quality to HD reduces data consumption by 75% and thus the impact of data centers. For heavy usage (several hours per day), this can represent 20 to 40 kg of CO2 saved per year.
To go further on this topic, see our dedicated article: The carbon footprint of digital technology: emails, streaming, cloud — what can you do?
Consumption: buy less and buy better
13. Buy second-hand instead of new
The fashion industry accounts for 8 to 10% of global CO2 emissions. Buying a second-hand garment instead of a new one avoids an average of 6 kg of CO2 per item. For someone who buys 30 garments per year (the French average), switching to 50% second-hand represents savings of 90 kg of CO2 per year.
14. Repair instead of replace
The repair bonus, introduced in France in 2023 by the government, covers part of the repair costs for certain household and electronic appliances. Repairing your washing machine rather than buying a new one avoids the emission of 200 to 400 kg of CO2 associated with manufacturing a new appliance.
15. Save and invest responsibly
Less visible but highly impactful: your savings. A euro invested in a fund that backs fossil fuel industries indirectly contributes to financing CO2 emissions. By directing your savings toward ESG funds or ethical banks, you act on your financial footprint. This is one of the highest-leverage actions for households with savings capacity.
Where to start?
Faced with this list, it can be hard to know where to begin. The answer is simple: start by calculating your carbon footprint to identify your highest-impact areas, then tackle the actions with the greatest impact in your personal situation first.
For a complete calculation method, see our article: Food and carbon footprint: the complete guide. And to understand how each area of your daily life contributes to your overall footprint, also read: The carbon footprint of digital technology explained.
Conclusion: consistency over perfection
The goal is not to achieve a zero carbon footprint — that is impossible in today's societies. The goal is a substantial and progressive reduction, guided by consistency rather than perfection. Every tonne of CO2 not emitted counts. And every transformed habit quickly becomes second nature.