For the validation according to EMAS the preparation of an environmental statement is mandatory. ISO 14001 leaves the decision to you if you want to communicate to the public. Sustainability reporting has become increasingly important for many companies, eg in line with the standards of the Global Reporting Initiative.
If you decide to externally communicate in this area, the report has to be true, clear and comprehensible. EMAS and GRI include concrete requirements with regard to contents. Numbers, data and facts have to be aligned. For the EMAS Environmental Statement all contents are reviewed in detail by the environmental verifier. I know many environmental statements and will be glad to support you in the preparation of the contents.