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Added: 24.02.2021
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In an ambitious paper published in the scientific journal Nature Climate Change , an international team of scientists has quantified the environmental impact of everything from transatlantic flights to cheap souvenirs. Perhaps unsurprisingly, the countries causing the most harm were also among the largest in both wealth and size — with the US, China and Germany topping the rankings. Air travel was the main culprit, and the researchers suggested the high-polluting industry would become increasingly problematic as the world gets richer and there is more demand for luxury travel. The global tourism industry as a whole has been growing at an annual rate of around 5 per cent, outpacing the growth of international trade. Their study quantified the carbon footprints of tourism operations — including transport, events, hotels, food and shopping — in countries, as well as the relevant upstream supply chains.
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Radioactive Decay - Physics LibreTexts

Quantitative Chemistry calculations online Help for problem solving in doing empirical formula calculations, using experiment data, making predictions. This page describes and explains, with fully worked out examples, how to work out the empirical formula of a compound. The empirical formula of a compound is defined and explained. These revision notes and practice questions on how to do empirical formula calculations in chemistry and worked examples should prove useful for the new AQA, Edexcel and OCR how to deduce and work out empirical formula 9—1 chemistry science courses.
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Half-Lives and Radioactive Decay Kinetics

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