Visit of U.S. President George Bush in Ottawa. Substantial progress has been made ¿¿in the case of acid rain. The reaction of the Canadian Coalition against acid rain. George Bush descends from aircraft. Mila Mulroney and Barbara Bush visit a school. Barbara Bush and Mila Mulroney visit the Museum of fine Arts in Ottawa. Press conference George Bush and Brian Mulroney. Michael Pearley ecologist. Keywords: CANADA,UNITED STATES,ACID RAIN,VISIT