What are El Niño and La Niña and how do they affect Earth's weather?

El Niño and La Niña significantly impact Earth's weather patterns. We explore the events in more detail here and take a look at how they impact Earth's weather.

What are El Niño and La Niña and how do they affect Earth's weather?
El Niño and La Niña significantly impact Earth's weather patterns. We explore the events in more detail here and take a look at how they impact Earth's weather.