Low CO2 Snow vs. High CO2 Snow

Via Steven Goddard, 27 July 2011

    Significant snow storms have occurred in Christchurch in 1862, 1895, 1896, 1901, 1918, 1945, 1992 and 2006 (and 2011)

    http://www.starcanterbury.co.nz/

The earlier storms were due to a low CO2 atmosphere and the more recent storms are the direct result of a high CO2 atmosphere. Low CO2 snow is white, whereas high CO2 snow is white.

The above was found here.

But weren't we told back in 2000 that, as the world warms,  "children aren't going to know what snow is"?