Translation of sulfureous in German

We want to fly there again on Christmas, depending on Jenny's work. Maya entered kindergarden last week, and there were a lot of tears (mainly by her mother and not by herself. I guess that is natural.
The climb was much exhausting than I had presumed. I had forgotten that we were at high altitude where there is less oxygen and that every step required double effort. It was a great exercise.
The ferry took me to the island. Sitting next to me there was a local guy with two packs of beer, and he seemed pretty drunk for this hour of the day. He offered me some beer and I was polite.