The title is a typical WB pun (as in "fresh air") that has little or nothing to do with the plot, other than being set in the crisp, frigid air of a Canadian winter.
In this short, the rotund early-1940s version of Elmer Fudd is portrayed as a Mountie, in pursuit of Bugs Bunny, who is wanted for being a "screwy wabbit", across the snow-packed tundra (presumably in Canada). Elmer elaborates on the charges: "Wesisting awwest, distuwbing the peace, being a pubwic nuisance, jaywawking, conduct unbecoming a wabbit." Bugs soon teaches Elmer that these are far from the only tricks he can pull.
The end of this cartoon where Bugs proclaims his last wish in a chorus of "I Wish I Were in Dixie", which is followed by Bugs, Elmer Fudd and the Mounties all in blackface singing "Camptown Races" has been targeted for censorship because of its black stereotypical depictions of African Americans[Black People]