India, July 16 -- Scientists explain ocean warming by comparing it to billions of mugs of tea poured into the sea every second.

In 2021, oceans absorbed about 15 zettajoules of heat, equal to 4.8 billion hot mugs per second.

By 2025, this rose to 23 zettajoules, or 7.6 billion mugs, highlighting accelerating warming, rising seas and the urgent need to cut fossil fuels.

Imagine almost every person on Earth doing nothing but making cups of tea, day and night, one every second - and pouring every single one into the sea.

It sounds absurd. Yet it helps us picture one of the biggest changes happening to our planet.

Although we experience global warming through hotter air and record-breaking heatwaves, the atmosphere is only a sideshow, wh...