Almost Nothing Is Done to White Tea. Then the Kettle.
White tea is withered and dried and given no further processing, but two life-cycle studies that follow it from the nursery to the cup both put the drinker's kettle at or near the top of its emissions.
White tea is withered and dried, and those two steps are the whole of its manufacture. Nothing is rolled, fired, or shaped, which is why the class has spent its whole history being described by what is left out of it. Follow the same tea across its entire life, though, from the nursery bed to the spent leaf in the bin, and the heaviest single stage is none of that. It is water heating in a kitchen.
Two life-cycle studies have put figures on it. A 2024 assessment of tea grown in Tamil Nadu found the consumption stage, which is the drinker boiling water, contributing 45 to 56 percent of the total footprint, the largest of the six stages it counted. A 2026 assessment built on data from fifteen Fuding enterprises put consumption at 5.17 to 5.67 kilograms of carbon dioxide equivalent per kilogram of finished tea, against an average total of 16.94, or roughly a third of it. The two disagree on how much. They agree on where.
The six stages, counted
The Tamil Nadu work is Insights of carbon footprint of tea through life cycle approach1, by Premalatha and colleagues in Plant Science Today in 2024. It follows tea through six stages: cultivation, processing, packaging, transportation, consumption, and disposal. Each stage is charged with the emissions it causes, and the six are added.
The consumption stage came out on top. In the authors' own summary it "contributed the highest CO2 emissions, accounting for 45%-56% to overall CF." Black tea's consumption stage was the lower end of that, 45 percent, or 5.8 kilograms per kilogram of made tea. Green and white tea, which the paper reports together at this stage, came in at 8.3 kilograms, 56 percent.
| Stage | Share of the total footprint |
|---|---|
| Consumption | 45 to 56 percent |
| Processing | 12 to 19 percent |
| Packaging | 15 to 17 percent |
| Cultivation | 10 to 11 percent |
The paper names processing the second largest source, then packaging, then cultivation, and the middle two ranges overlap as stated. Totals across the whole life cycle came to 12.9 kilograms per kilogram of made tea for black and white tea alike, and 14.79 for green. That ratio reads the same in any consistent pair of units: 12.9 pounds of the gas for every pound of made tea.
Where a clean white-tea percentage cannot be read
Premalatha and colleagues do not group their teas the same way at every stage, and for white tea that is the whole difficulty. The consumption figure of 8.3 kilograms and 56 percent is reported for green tea and white tea together. The cradle-to-grave total of 12.9 kilograms is reported for black tea and white tea together.
Those two groupings do not close on white tea. Divide 8.3 by 12.9 and the consumption share comes to about 64 percent, not the 56 the paper states. So there is no single, arithmetically clean white-tea consumption percentage to lift out of this study, and anyone quoting one has picked a grouping and dropped the other.
What the paper does support is its own stated range: consumption is the largest of the six stages, at 45 to 56 percent of the total.
Fifteen enterprises in Fuding
The second measurement is of Fuding white tea specifically. Quantifying the Carbon Footprint of Fuding White Tea Production2, by Hao, He, Dai and colleagues in Agronomy, published online in February 2026, works from complete life-cycle data supplied by fifteen tea enterprises in Fuding. Its average carbon emission intensity is 16.94 kilograms per kilogram of finished tea in the crude state, with a spread of 3.41 either side.
Three inputs account for most of that: electricity at 45 to 68 percent of total emissions, water use at 15 to 26 percent, and fertilizer at 7 to 22 percent.
The study names two hotspots rather than one. Processing runs 4.10 to 12.73 kilograms per kilogram, which the authors attribute mainly to energy-intensive drying and refining. Consumption runs 5.17 to 5.67, dominated by water heating. Across 216 modelled scenarios, production emissions ranged from 15.44 to 22.72 kilograms per kilogram.
Two further findings come from the same abstract, and both need their conditions stated alongside them. Emissions could be reduced by up to 56 percent through integrated measures, the authors' examples being organic fertilization, natural withering, and short-chain distribution. And once tea-garden carbon sequestration is counted, at 1.17 to 8.45 kilograms per kilogram, Fuding white tea production could potentially reach net-negative emissions. That last result is a best-case corner, not a general finding: it requires the low end of the emissions range, the high end of the sequestration range, and the reduction measures, all at once.
This study's full text was not reachable for this entry. Every figure above is one the paper states in its own published abstract, which means its brewing assumptions, how much water per gram and in what appliance, are not on the record here.
The two studies agree on direction and not on size
Tamil Nadu puts consumption first among six stages, at 45 to 56 percent of the whole. Fuding puts consumption at roughly a third of the total, standing alongside processing rather than clear of it.
They are not measuring the same object on the same terms. Different countries, different electricity supplies behind the same appliance, different system boundaries, and, at the consumption stage, different assumptions about how much water a person heats for how long. Averaging the two would produce a number neither paper supports.
In a product whose manufacture consists of withering and drying, the stage performed by the person doing the drinking is the largest of six in one study and one of the two named hotspots in the other.
How much water gets heated moves the number
A separate UK analysis shows how far that stage can swing on behaviour alone. The Carbon Footprint of a Cup of Tea3, published by Jack Pearce at Circular Ecology in February 2022, is about black tea in bags, taken with milk, and it counts the bags and the milk. It is a different object from a loose Fuding bud, and its base case reflects that: 31.5 kilograms per kilogram of tea, of which packaging is 53 percent and consumption 13.
Change two consumer habits and the shares invert. With an overfilled kettle and milk, the same analysis reaches 46.4 kilograms per kilogram, packaging down to 34 percent and consumption up to 43. On the kettle by itself the analysis states: "if we assume we are using twice as much than needed (500 ml), the GWP (global warming potential) of tea increases by 76%." Five hundred millilitres is about a pint, boiled for a cup that needed half of it.
Behind that assumption is a habit the analysis also cites: three-quarters of British households overfill their kettles.
The convention for the buds, and the kettle
This site's brewing guide records a split that runs right through white tea. The laboratory tasting standards brew hot and long: GB/T 23776 tests white tea in boiling water for five minutes, and the peer-reviewed optimum for antioxidant polyphenols in a cup a panel still liked was 98 °C (about 208 °F) for seven minutes. The convention a drinker is given for the tender buds runs the other way. Silver needle takes 85 to 90 °C (185 to 194 °F) and a shorter steep, because a rolling boil pulls astringency to the front of the glass and cooler water holds the sweetness.
That convention was settled for the cup, by drinkers comparing one glass of buds against another, and it predates either of these measurements. Heating less water, and heating it less hot, uses less energy. The brew the flavour convention arrived at and the lower-energy brew are the same brew.
Neither study puts a figure on what the cooler brew saves. The only consumer number this work does measure is the opposite one: fill the kettle to twice what the cup needs, and the tea's global warming potential rises by 76 percent.