Letters, June 21, 2008 Issue

Readers share their thoughts on “Down with carbon” (SN: 5/10/08, p. 18), which describes carbon dioxide sequestration:

Complex schemes
The article repeatedly mentions liquid CO2, which has to be under high pressure to become a liquid. Has the CO2 released from burning fuel to run the necessary compressors and pumps been considered, or would those be powered with wind or solar energy? If so, why not just use those sources directly to replace fossil fuels and make less CO2 to begin with? Why keep devising complex technological schemes to fix problems rather than simply avoiding the technologies that cause the problems?
BRUCE NOVAK, NEEDHAM, MASS.