I also remember Sweden being like this until early/mid 90s. The only real change AFAIK was peoples' attitudes, as a result of government campaigns.
Hell, in the 60s you could watch wonderfully informational movies as this on the one and only available TV station https://www.youtube.com/watch?v=XrcrX9Qaw2o. (skip to 1:15 for the recommended practise of waste removal near the ocean).
Hell, in the 60s you could watch wonderfully informational movies as this on the one and only available TV station https://www.youtube.com/watch?v=XrcrX9Qaw2o. (skip to 1:15 for the recommended practise of waste removal near the ocean).