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An allotrope of oxygen, consisting of 3 oxygen atoms.
chemistry, ozone, oxygen atom, allotropy
The ozone layer filters the Sun´s harmful UV radiation, therefore it is indispensable for life on Earth.
Human activity increases the greenhouse effect and leads to global warming.
A colourless, odourless gas, an important component of the atmosphere, indispensable to sustain terrestrial life.
This animation demonstrates the main sources of air pollution: agriculture, industry and urban settlements.
The oxygen cycle describes the movement of oxygen within its three main reservoirs.
This animation demonstrates how a refrigerator works.