def _env(self, line):
        '''env will parse a line that beings with ENV, indicative of one or
           more environment variables.
 
           Parameters
           ==========
           line: the line from the recipe file to parse for ADD
   
        '''
        line = self._setup('ENV', line)

        # Extract environment (list) from the line
        environ = parse_env(line)

        # Add to global environment, run during install
        self.install += environ

        # Also define for global environment
        self.environ += environ