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Air is an essential component for life on Earth because it contains the oxygen that is necessary for living organisms to breathe. The air completely surrounds the Earth and literally wraps it up in a shroud that, under the effect of gravity and centrifugal force caused by the Earth’s rotation, takes a spheroid shape (think of the shape of an egg), flatter at the poles and bulging at the Equator. This is why, even if its boundaries with the interplanetary spaces cannot be accurately identified, it has been called atmosphere (from the Greek atmòs = steam, and sfaira = sphere). Atmosphere acts as a filter against harmful radiations from the Sun, by reflecting them and preventing them from reaching the ground, and it allows the Earth’s surface to remain at a temperature that is suitable for the life of plants and animals. The atmosphere is also the zone of the principal meteorological phenomena (wind, rain, snow, etc.) which, together, form the climate.

subjects dealt with in Air knowledge

What it is

The air we breathe consists of a mixture of gases and solid and liquid particles. Its composition is not constant,…

Atmosphere

The air completely surrounds the Earth and literally wraps it up in a shroud that, under the effect of gravity…

special reports

  • 29 April 2020 / Air

    Lightning

    Help! a storm! Man has always been afraid of lightning, in fact in the past lightning was considered a sign…

    23 October 2017 / Air

    Carbon Footprint

    CO2 emissions and lifestyles If your parents decide to buy a new car, they might be attracted by a car…

    5 September 2022 / Air

    The Arctic is warming up four times faster

    The planet is warming due to the greenhouse effect—this is now clear to all of us. What is less well…

  • 23 June 2022 / Air

    Climate and the Earth's volcanoes

    We know that the chief greenhouse gas is carbon dioxide. We also know that the greenhouse effect is the cause…

    15 November 2021 / Air

    How did Cop26 end?

    On Saturday afternoon in Glasgow, representatives of more than 200 countries attending the COP26 United Nations climate change conference reached…

    5 November 2021 / Air

    Cop26, the calendar for the climate conference

    1 November was the first day of the summit, the opening ceremony of which began with a speech by British…

  • 25 August 2021 / Air

    Geo-engineering: a contribution to mitigate climate change?

    Climate change is a fact. And the role of man in determining such change is scientifically established. Normally depicted by…

    29 April 2020 / Air

    Lightning

    Help! a storm! Man has always been afraid of lightning, in fact in the past lightning was considered a sign…

    5 August 2019 / Air

    Summer wind

    A sixteen-year-old Swedish girl is braving the wind, cold and rain to take her protest against the changing climate onto…

  • 29 April 2020 / Air

    Lightning

    Help! a storm! Man has always been afraid of lightning, in fact in the past lightning was considered a sign…

    23 October 2017 / Air

    Carbon Footprint

    CO2 emissions and lifestyles If your parents decide to buy a new car, they might be attracted by a car…

  • 5 September 2022 / Air

    The Arctic is warming up four times faster

    The planet is warming due to the greenhouse effect—this is now clear to all of us. What is less well…

    23 June 2022 / Air

    Climate and the Earth's volcanoes

    We know that the chief greenhouse gas is carbon dioxide. We also know that the greenhouse effect is the cause…

  • 15 November 2021 / Air

    How did Cop26 end?

    On Saturday afternoon in Glasgow, representatives of more than 200 countries attending the COP26 United Nations climate change conference reached…

    5 November 2021 / Air

    Cop26, the calendar for the climate conference

    1 November was the first day of the summit, the opening ceremony of which began with a speech by British…

  • 25 August 2021 / Air

    Geo-engineering: a contribution to mitigate climate change?

    Climate change is a fact. And the role of man in determining such change is scientifically established. Normally depicted by…

    29 April 2020 / Air

    Lightning

    Help! a storm! Man has always been afraid of lightning, in fact in the past lightning was considered a sign…

  • 5 August 2019 / Air

    Summer wind

    A sixteen-year-old Swedish girl is braving the wind, cold and rain to take her protest against the changing climate onto…

  • 29 April 2020 / Air

    Lightning

    Help! a storm! Man has always been afraid of lightning, in fact in the past lightning was considered a sign…

  • 23 October 2017 / Air

    Carbon Footprint

    CO2 emissions and lifestyles If your parents decide to buy a new car, they might be attracted by a car…

  • 5 September 2022 / Air

    The Arctic is warming up four times faster

    The planet is warming due to the greenhouse effect—this is now clear to all of us. What is less well…

  • 23 June 2022 / Air

    Climate and the Earth's volcanoes

    We know that the chief greenhouse gas is carbon dioxide. We also know that the greenhouse effect is the cause…

  • 15 November 2021 / Air

    How did Cop26 end?

    On Saturday afternoon in Glasgow, representatives of more than 200 countries attending the COP26 United Nations climate change conference reached…

  • 5 November 2021 / Air

    Cop26, the calendar for the climate conference

    1 November was the first day of the summit, the opening ceremony of which began with a speech by British…

  • 25 August 2021 / Air

    Geo-engineering: a contribution to mitigate climate change?

    Climate change is a fact. And the role of man in determining such change is scientifically established. Normally depicted by…

  • 29 April 2020 / Air

    Lightning

    Help! a storm! Man has always been afraid of lightning, in fact in the past lightning was considered a sign…

  • 5 August 2019 / Air

    Summer wind

    A sixteen-year-old Swedish girl is braving the wind, cold and rain to take her protest against the changing climate onto…

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