my @envars;

push @envars,{ value => 23, description => 'temperature in Celsius' },
              { value => 56, description => 'relative humidity in %' },
              { value => 1008.1, description => 'pressure in millibars' },
              { value => 4, description => 'dewpoint in degrees Celsius' },
              { value => 344, description => 'total column ozone in Dobson Units' };