🕊️🇺🇸 UNITED STATES • NATIONAL COMMEMORATION National Korean War Veterans Armistice Day 27 th July Honoring the Courage, Sacrifice & Service of the Heroes of the Forgotten War Every year on 27 July , the United States observes National Korean War Veterans Armistice Day , commemorating the signing of the Korean Armistice Agreement on 27 July 1953 , which brought an end to active combat during the Korean War. The observance honors the extraordinary courage, sacrifice, and unwavering dedication of the men and women who served in a conflict often remembered as the "Forgotten War." 📅 Historic Date 27 July 1953 – Korean Armistice Agreement Signed 🕊️ Purpose Honor Korean War veterans and remember their sacrifice. 🇺🇸 Remembered As "The Forgotten War" 📖 The Korean War and the Armistice The Korean War began on 25 June 1950 when North Korean forces crossed the 38th Parallel into South...
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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