How El Niño and La Niña cause extreme weather

From The Economist.

El Niño and La Niña are opposite states of one of Earth’s most important climate processes, the El Niño Southern Oscillation, or ENSO. It can lead to devastating weather events all over the world. But how does it work, what kinds of extreme weather does it cause and how is global warming affecting it?

00:00 – What is ENSO’s neutral state?
03:15 – What is El Niño?
07:24 – What is La Niña?
10:36 – ENSO and climate change

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