EditorialCement mix containing calcium carbonate, produced from the carbon dioxide from the boilers at a Manhattan apartment building, at Glenwood Mason Supply, a concrete plant in Brooklyn, on Feb. 15, 2023. (Hiroko Masuike/The New York Times)
EditorialCement mix containing calcium carbonate, produced from the carbon dioxide from the boilers at a Manhattan apartment building, at Glenwood Mason Supply, a concrete plant in Brooklyn, on Feb. 15, 2023. (Hiroko Masuike/The New York Times)
EditorialMany doctors recommend a coronary calcium scan to pinpoint which patients would benefit from treatment to reduce their cardiovascular risk. (Rachel Levit/The New York Times)
EditorialA moringa tree, a fast-growing, drought-resistant variety rich in vitamins, protein, calcium and iron, in the Sahrawi settlement in the Algerian desert, Jan. 31, 2020. (Matteo de Mayda/The New York Times)