Colour state other than clouds or low visibility (e.g. ice or other obstructions) then the word BLACK is written in full and placed immediately before the actual colour state (e.g. BLACKWHT). The colour state may be appended to a METAR report. A short period forecast called a "TREND" which covers the following two hours from the observation may also be added, often with reference to the colour state. The following criteria are used to determine the colour state: Colour state Colour states is a system used for quickly showing meteorological conditions. Meteorological colour states are determined by the relevant worst condition from
Ecotourism routes in Europe where to go out, what to visit, and how to organize their own personalized journeys. The workshops of the OECD (Organization for Economic Cooperation and Development) let 130 countries participate in exchanging ideas in the organization for the rural development. Pierre Guerry, consultant of this workshop as marketing expert, proposed an approach of ecotourism to promote the local products and the territorial specificities in the supranational level. Afterward, the approach was suggested to the institutional organizations. Ecotourism routes in Europe The five eco-tourism Pan-European routes cross 35 countries in Europe by connecting natural parks (national parks and regional parks) to