>>4572338Slovenia is more green, since it's a hillier place.
Southern Hungary also has forests in the Mecsek region. Same for Northern Hungary and the Balaton region. These areas are hilly and more green. The tallest mountain in Hungary is only 1000-something meters tall, so the hilly areas aren't that bad they are pretty comfy with lots of hiking paths, forests and some ruined castles.
The Great Plain occupies most of the country, which is ideal for agriculture, so most of the forests there were destroyed centuries ago to make place for fields.