The exact opposite end of the earth or 180degrees
According to the EPA... If someone burns fossil fuels<span>, the reaction releases nitrogen oxides up and into the atmosphere. This </span>contributes<span> to the creation of smog (sometimes acid rain). The biggest sources of nitrogen oxide emissions are: vehicles, coal power plants, ships, airplanes, and large industrial operations.</span>
2HCL + __ Zn --> ZnCl2 + H2
i think that's right, not exactly sure.
The cycle is called carbon cycle :)