Climate Scientist: The rising levels of methane in the atmosphere, which pose a significant risk to global climate stability, can only be mitigated by decreasing agricultural emissions. Any nation that enforces the stringent regulations on agricultural practices necessary for this reduction, however, would consequently face a decline in its economic output. No country will be willing to shoulder the financial burden of an initiative that benefits the global community. It is clear, then, that the dire effects of increasing atmospheric methane are inevitable unless _______. Which one of the following most logically completes the argument?