Atmosphre Und Umwelt: Chemische Prozesse  Menschliche Eingriffe Ozonschicht  Luftverschmutzung Smog  Saurer Regen (German Editi,Used

Atmosphre Und Umwelt: Chemische Prozesse Menschliche Eingriffe Ozonschicht Luftverschmutzung Smog Saurer Regen (German Editi,Used

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Unsere Atmosphare, das Luftmeer, auf dessen Grunde wir leben, ist ein Gasgemisch, das neben den Hauptbestandteilen Stiekstoff und Sauerstoff eine Vielzahl von Spurengasen enthalt. Dieses Gasgemisch an sich ware reaktionstrage und somit von geringem chemischen Interesse, wiirde es nicht im Wechsel von Tag und Nacht und im Rhythmus der Jahreszeiten von der Sonne bestrahlt. Die Sonnenstrahlung, insbesondere ihr energie reieher Ultraviolettanteil, vermag die meisten Konstituenten des atmo spharischen Gasgemisches in ihre Bestandteile zu spalten. Durch diesen photochemischen Prozel3, den man als 'Photolyse' oder 'Photodissozia tion' bezeiehnet, entstehen aul3erst reaktive Substanzen, die fUr uns Erdbewohner wichtige chemische Reaktionsketten auslOsen. Lediglich die atmospharischen Edelgase, Argon, Neon, Helium und Krypton (in der Reihenfolge ihrer Haufigkeit) nehmen an dies en Prozessen nieht tei!. Der wohl wichtigste photochemische Prozel3 in unserer Atmosphare ist die Bi!dung von Ozon (s. Abschnitt 2). Ozon ist die dreiatomige Form des Luftsauerstoffs, 0 Der normale Sauerstoff besteht aus O, zwei mit 3 2 einander verbundenen SauerstoffAtomen. Unter Einwirkung der Ultra violettstrahlung der Sonne wird ein Teil des Luftsauerstoffs O gespalten, 2 und die gebildeten Sauerstoffatome konnen sieh mit zweiatomigen Sauer stoffmolekulen zum dreiatomigen Ozon verbinden. Die hieraus resultie rende atmospharische Ozonschieht ist fUr uns in zweifacher Hinsicht von grol3er Bedeutung. Zum einen schirmt sie die gefahrliche Ultraviolett strahlung der Sonne ab, welche ohne diesen Filter alles Leben auf dem Festland ausloschen wiirde. Zum anderen bewirkt die Energie dieser in der Hohe absorbierten Strahlung dort eine beachtliche Erwarmung, sie hat damit Einflul3 auf die allgemeine Luftzirkulation.'

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Shipping & Returns

Shipping
We ship your order within 2–3 business days for USA deliveries and 5–8 business days for international shipments. Once your package has been dispatched from our warehouse, you'll receive an email confirmation with a tracking number, allowing you to track the status of your delivery.

Returns
To facilitate a smooth return process, a Return Authorization (RA) Number is required for all returns. Returns without a valid RA number will be declined and may incur additional fees. You can request an RA number within 15 days of the original delivery date. For more details, please refer to our Return & Refund Policy page.

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Warranty

We provide a 2-year limited warranty, from the date of purchase for all our products.

If you believe you have received a defective product, or are experiencing any problems with your product, please contact us.

This warranty strictly does not cover damages that arose from negligence, misuse, wear and tear, or not in accordance with product instructions (dropping the product, etc.).

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