Greenhouse effect

Human activity increases the greenhouse effect and leads to global warming.

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The Jovian planets

The four outer planets (Jupiter, Saturn, Neptune and Uranus) do not have solid surfaces, thus...

Ozone layer

The ozone layer filters the Sun´s harmful UV radiation, therefore it is indispensable for...

El Niño

A periodic climate pattern that occurs across the tropical Pacific Ocean every five years.

How do seas shape the Earth's surface?

Seawater, as an external force, plays an important role in shaping coastlines.

The Tundra: a green-edged icy wasteland

Is the tundra region as cold and deserted as many people think?

Mid-latitude cyclone and anticyclone

Cyclones are large areas of circulating air with clouds and precipitation being formed in...

Volcanic activity

The area surrounding an inactive or extinct volcano is not necessarily calm. Let’s see the...

Plate tectonics

Plate tectonics is a theory dealing with the movement of plates.

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