44Whilst it is undisputed that Article 191(2) TFEU requires EU policy in environmental matters to aim for a high level of protection, such a level of protection, to be compatible with that provision, does not necessarily have to be the highest that is technically possible. Article 193 TFEU authorises the Member States to maintain or introduce more stringent protective measures (see judgments of 14 July 1998, Safety Hi-Tech, C‑284/95, EU:C:1998:352, paragraph 49, and of 14 July 1998, Bettati, C‑341/95, EU:C:1998:353, paragraph 47).
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