Coffee vs Tea Carbon Footprint: Which Brew is Greener?

Overview

For many of us, the day doesn't truly begin until we've had our first warm mug of coffee or tea. While these rituals are deeply personal, they also carry distinct environmental prices. When we compare coffee and tea, we aren't just looking at the leaves versus the beans; it's a journey through tropical deforestation, intensive water use, and the heavy carbon burden of dairy.

While both beverages come from plants grown in similar equatorial regions, the resources required to bring them to your kitchen differ significantly. From the land required for coffee plantations to the energy-intensive drying process of tea leaves, every step counts. However, as we dive into the data, you'll see that the biggest climate impact often isn't the crop itself, but what you choose to pour into it.

The Numbers

When comparing a standard cup (approx. 250ml) of these beverages, including a modest splash of semi-skimmed cow's milk, the winner is clear.

• Black Tea: A cup of tea brewed with boiled water and no milk emits roughly 0.03 kg CO2e. Adding milk brings that total to approximately 0.07 kg CO2e.
• Black Coffee: An average cup of black coffee (brewed via filter or pour-over) emits roughly 0.15 kg CO2e. Adding the same splash of milk brings the total to approximately 0.20 kg CO2e.
• The Latte Factor: If you swap a standard coffee for a milk-heavy latte or cappuccino, the footprint skyrockets to 0.55 kg CO2e or more, simply because of the high volume of dairy.

On average, a standard cup of coffee with milk has a carbon footprint nearly 3 times larger than a standard cup of tea with milk.

Why the Difference?

The disparity between coffee and tea comes down to three primary factors: agricultural intensity, processing requirements, and the "yield per hectare."

1. Land Use and Biodiversity

Coffee is often grown in areas prone to deforestation. According to studies by Poore & Nemecek (2018), coffee production requires significantly more land per kilogram of finished product than tea. This land-use change—converting forests to monoculture plantations—releases stored carbon and reduces the planet's ability to absorb future emissions.

2. Fertilizers and Methane

Coffee plants are nitrogen-hungry. The production and application of synthetic fertilizers release nitrous oxide, a greenhouse gas 300 times more potent than CO2. While tea plantations also use fertilizers, the overall chemical input per cup of tea remains lower because you need far less "dry weight" of tea leaves to brew a cup compared to the weight of coffee grounds required for a single serving.

3. Processing and Transport

Coffee cherries go through a rigorous "wet" or "dry" processing method to extract the bean, followed by energy-intensive roasting. Tea leaves are generally withered, rolled, and dried. While both are transported globally, the sheer volume of coffee consumed worldwide means its logistics chain is much more infrastructure-heavy.

4. The Milk Variable

In both drinks, dairy milk is often the single largest contributor to the carbon footprint. Cows produce methane through enteric fermentation, and the feed used for livestock often contributes to further deforestation. A latte is effectively a "dairy drink flavored with coffee," making its footprint significantly higher than any tea.

What You Can Do

Changing your morning routine can lead to measurable carbon savings over a year. Here is how to optimize your brew:

• Switch to Tea: If you are indifferent to the caffeine source, switching from coffee to tea can save you over 40kg of CO2e annually.
• Go Black or Go Plant-Based: If you can't give up coffee, try it black or switch to oat or soy milk. Oat milk, in particular, has roughly one-third the carbon footprint of dairy.
• Boil Only What You Need: A significant portion of a tea's footprint comes from the electricity used to boil the kettle. Only filling the kettle for one cup saves energy and water.
• Choose Shade-Grown or Organic: Organic coffee avoids synthetic fertilizers, and shade-grown varieties help maintain biodiversity and sequester more carbon in the soil.
• Ditch the Pods: Single-use plastic or aluminum pods add unnecessary waste and manufacturing emissions. Stick to French press, aeropress, or drip filters.

Curious about how your specific caffeine habit affects the planet? Use our Carbon Calculator to get a personalized estimate and discover more ways to lower your daily impact.