Black tea and green tea can come from the same plant, differing mainly in how the leaves are processed.

The longer version

Both come from the same evergreen shrub, and the difference lies almost entirely in what happens after picking. For green tea, leaves are heated soon after harvest to deactivate the enzymes that would otherwise oxidize their compounds, so the leaf stays green and grassy.

For black tea, leaves are withered and rolled, which breaks cells and lets enzymes convert catechins into larger molecules that darken the leaf and produce malty, brisk flavors. Partial oxidation gives the middle styles. Processing choices, growing altitude, and harvest time all shift the final character considerably, so a single plant can yield a wide family of drinks.

Where this entry sits

Everyday ingredients turn out to be full of quiet chemistry and long history. This collection gathers short, plain explanations of how bread rises, why onions sting, where common spices originate, and how coffee, tea, and chocolate reached the modern kitchen. The full list sits on the Food and Drink page, where every entry is listed in order.