https://padlet.com/elenaandinoderas/ibar3d5ogt3il6jl El plástico se ha hecho tan omnipresente que resulta difícil creer que apenas llevamos produciéndolo a escala industrial desde hace solo unas décadas. Su historia es más reciente de lo que se podría pensar. Los primeros plásticos totalmente sintéticos empezaron a fabricarse a comienzos del siglo XX: la baquelita, ideada en 1907, fue el primero de ellos, pero no fue hasta después de la II Guerra Mundial cuando arrancó la fabricación y utilización masiva de todo tipo de materiales de ese tipo. en-us 2022-08-12 04:44:07 UTC 2024-04-05 00:59:06 UTC hello@padlet.com https://padlet.net/icons/png/1f9ea.png elenaandinoderas https://padlet.com/elenaandinoderas/ibar3d5ogt3il6jl/wish/2381199974 2022-11-12 20:22:18 UTC https://padlet.com/elenaandinoderas/ibar3d5ogt3il6jl/wish/2381199974 elenaandinoderas https://padlet.com/elenaandinoderas/ibar3d5ogt3il6jl/wish/2381200232 2022-11-12 20:23:04 UTC https://padlet.com/elenaandinoderas/ibar3d5ogt3il6jl/wish/2381200232 elenaandinoderas https://padlet.com/elenaandinoderas/ibar3d5ogt3il6jl/wish/2381201419 2022-11-12 20:26:40 UTC https://padlet.com/elenaandinoderas/ibar3d5ogt3il6jl/wish/2381201419 elenaandinoderas 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