1 2 3 4 1 _ _ _ _ 2 _ _ _ _ 3 _ _ _ _ 4 _ _ _ _ ACROSS 1) not easy; requiring great physical or mental effort to accomplish or comprehend or endure 2) a european river; flows into the baltic sea 3) celtic goddess who was the mother of the tuatha de ____nn; identified with the welsh don 4) air pollution by a mixture of smoke and fog DOWN 1) an open box attached to a long pole handle; bricks or mortar are carried on the shoulder 2) (old testament) in judeo-christian mythology; the first man and the husband of eve and the progenitor of the human race 3) a city in western nevada at the foot of the sierra nevada mountains; known for gambling casinos and easy divorce and remarriage 4) the phenomenon of resistance to motion through a fluid ** Scroll down for solution. ** Are you sure you want to peek? hard oder dana smog