The factsheet is vague because it tells countries to find a way to fix a problem. All countries have to come up with a realistic method to improve natural areas, 20% by 2026, 30% need a concrete plan by 2030 and 90% by 2050.
More importantly, there's a requirement that Member States make a significant effort to prevent worsening in the meantime.
What those plans are, is up to the Member States, but they need to be solid and realistic, not the usual vagueness