🏙️ World Skyscraper Day – 3 rd September Celebrating architectural brilliance and the rise of modern cities 3rd September World Skyscraper Day 3rd September architecture engineering buildings urban development skyscraper day September 3rd Every year on 3 rd September , the world celebrates World Skyscraper Day , marking the birth anniversary of architect Louis Sullivan , widely regarded as the “father of skyscrapers.” This day honors the incredible advancements in architecture and engineering that have transformed skylines across the globe. 🏗️ The Rise of Skyscrapers Skyscrapers are more than tall buildings — they are symbols of innovation, ambition, and human ingenuity. Efficient use of limited urban space Technological breakthroughs in construction Iconic landmarks defining city identities 🌆 Transforming Urban Life Modern cities rely on vertical development to acco...
It
doesn’t! The oxygen level of the planet has varied quite dramatically in the
last 500 million years. It was 35 per cent during the Carboniferous period, around
300 million years ago; as the climate, cooled and land plants died off, oxygen
fell to as low as 12 per cent by the beginning of the Triassic. Back then, the
air at sea level would have felt thinner than at the top of the Alps today.
Burning
fossil fuels has reduced oxygen levels very slightly – about 0.057 per cent
over the last 30 years. Deforestation only has a small effect because when
rainforest is cut down, other plants are usually grown in its place. But it’s
marine phytoplankton (plant plankton), rather than trees, that produces about
75 per cent of atmospheric oxygen. Global warming will have a significant
impact on phytoplankton, which is a much more serious threat to oxygen levels.
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