Hesse is known as one of Germany's greenest states, with over 42% of its land area covered by forests.
* **Protected Areas:** The state features the **Kellerwald-Edersee National Park** (a UNESCO World Heritage site known for its ancient beech forests), alongside numerous nature parks like the Taunus, Odenwald, Spessart, and the Rhön Biosphere Reserve. * **Air and Water Quality:** Air quality is generally good, though the densely populated Rhine-Main region occasionally faces elevated nitrogen dioxide levels due to heavy commuter traffic. Water quality in lakes (like the Edersee) and rivers (the Rhine, Main, and Lahn) is closely monitored and has vastly improved over recent decades. * **Sustainability:** Hesse's *Klimaschutzplan* (Climate Action Plan) aims for climate neutrality. The state is investing heavily in wind energy, particularly in Northern Hesse, and promoting public transit expansion to reduce vehicular emissions. * **Agriculture:** The state has a strong organic farming sector. The agricultural landscape is diverse, ranging from vineyards in the Rheingau and Hessische Bergstraße to apple orchards (used for the famous *Apfelwein*) around Frankfurt and the Odenwald.