Hi! It’s konkaz (@konkazuk).
When we talk about our carbon footprint, food and travel tend to get most of the attention. But the electricity and energy we use at home also make up a significant share.
These are emissions quietly add up day after day, largely unnoticed.
The good news is that you don’t have to completely change your lifestyle to cut electricity use. Small tweaks can make a real difference. It’s something we should all be more aware of.
In this article, we’ll look at the relationship between household energy use and carbon footprint in three key points.
*As in other carbon footprint articles, I use “CO₂” here for the sake of clarity to mean total greenhouse gas emissions. In practice, this includes other gases such as methane and is measured as CO₂e.
Household electricity: ~30% of total emissions
It is said that roughly 30% of an individual’s carbon footprint comes from household energy use, such as electricity and gas.
In everyday life, whether in Japan or the UK, the energy we use at home typically produces around 1 kilogram of CO₂ per day, though this can vary depending on the season and household habits.
Electricity use at home doesn’t produce visible smoke or fumes like car exhaust, so it’s often difficult to notice the CO₂ it generates.
In reality, much of our electricity comes from fossil fuel power plants, which release CO₂ in the process.
Put simply, every time you turn on a switch, CO₂ is being released at the power plant somewhere behind the scenes.
The carbon footprint of household electricity use
So where does most of the CO₂ from home energy use actually come from?
For most households, it’s heating, cooling, and hot water that make up the biggest portion.
Air conditioning, heating, and producing hot water for showers and baths all require a relatively large amount of energy.
In the UK, most homes rely on gas boilers for this, while in Japan, air conditioners and water heaters account for a big part of household energy use.
In other words, reducing household CO₂ emissions largely depends on how we use heating, cooling, and hot water.
Small adjustments and smarter energy choices
Hearing “energy saving” might make you think of giving up comfort.
But in fact, even simple tweaks like:
▪️adjusting your heating or air conditioning by just 1°C
▪️shortening your showers a bit
▪️switching off lights in rooms you’re not using
can have a big impact.
Whether in Japan or the UK, taking these small steps day by day can help cut CO₂ emissions from your home little by little.
These days, you also have more choices, including:
▪️picking power companies that supply renewable energy
▪️using electricity in ways that produce less CO₂ (like switching to LED lights)
It’s possible to cut CO₂ emissions without drastically changing your lifestyle, simply by selecting electricity from a provider that relies on renewable or low-carbon sources.
Individual actions may seem small, but when these efforts add up, they can make a significant impact on reducing emissions across society.
For the sake of the next generation, everyone should try to keep these points in mind in their daily lives.
Until next time,
konkaz
*You can read this blog post in Japanese from the link below.
👉 家庭の電気はカーボンフットプリントの約3割？電気とCO₂排出の関係と今すぐできる削減方法