Diamonds haven’t always been a girl’s best friend. Before the 1930’s, they were no more synonymous with weddings than opals, rubies and sapphires which had been routinely used in engagement …
Tag:
CO2
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- Tech News
Engineers have built machines to scrub CO2 from the air – and it could halt climate change
On Wednesday this week, the concentration of carbon dioxide in the atmosphere was measured at 415 parts per million (ppm). The level is the highest in human history, and is growing …