In his recent Letter to the Editor, ‘A sad fact of life’ (12/6), Jim Riviello contends that “Carbon dioxide levels have nothing to do with the rising temperatures,” relying instead on contrarian climate research that blames “Anything But Carbon (ABC)” — here, banned CFCs causing “fluctuations of the sun” — for our planet’s woes. By doing so, he rejects numerous, validated studies demonstrating that emissions of heat-trapping greenhouse gasses from fossil fuel combustion are the drivers of climate change at rates never before seen. What I find most disturbing about Mr. Riviello’s piece, however, is the way he appears to so easily jettison those most impacted by climate change.