<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>gus_massa</author><text>This is too complicated and I&amp;#x27;m not convinced, but the research paper has more details that make more sense that the short press release &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;www.frontiersin.org&amp;#x2F;articles&amp;#x2F;10.3389&amp;#x2F;fenrg.2019.00143&amp;#x2F;full&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;www.frontiersin.org&amp;#x2F;articles&amp;#x2F;10.3389&amp;#x2F;fenrg.2019.0014...&lt;/a&gt;&lt;p&gt;They don&amp;#x27;t use the collected CO2 to make diesel fuel, they make methane. Some trucks may use methane as fuel.&lt;p&gt;IIUC they don&amp;#x27;t expect every gas station to have a converted from CO2 to fuel, but to have the conversion in the operational bases of the trucks, or collect it and send it to a specialized facility.&lt;p&gt;They use the heat from the exhaust gases to power the device, the calculations are in the paper.&lt;p&gt;They say that in other projects, they use the same heat of the exhaust gases to improve the efficiency of the fuel in a 10%. So this is not totally &amp;quot;free&amp;quot;.&lt;p&gt;How does this compare to releasing the CO2 (and getting a 10% of efficiency) and collecting the CO2 from the air in a central location?&lt;p&gt;How does this compare to using Hydrogen as fuel? I guess the difference is that most of this technology is buildable now, but Hydrogen storage is too difficult for now.&lt;p&gt;How does this compare with a electric truck? I guess this system gives more autonomy, but all the chemical reactions to convert the CO2 to methane are less efficient that good batteries.</text><parent_chain></parent_chain></comment><story><title>Catching CO2 from trucks and reducing their emissions by 90%</title><url>https://nuadox.com/post/189850038527/co2-trucks-emission</url></story>
<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>blunte</author><text>Their technology aside, I don&amp;#x27;t think it&amp;#x27;s a good idea to put 7% of their vehicle payload on the roof.  That would measurably elevate the center of gravity, which is not ideal for any vehicle that turns.</text><parent_chain></parent_chain></comment><story><title>Catching CO2 from trucks and reducing their emissions by 90%</title><url>https://nuadox.com/post/189850038527/co2-trucks-emission</url></story>