A Modest Proposal

According to the World Bank:

Cities are major contributors to greenhouse gas emissions. Half of the  world’s population lives in cities, a share that is likely to reach 70 percent in 2050 (Figure 5). Cities consume as much as 80 percent of energy production worldwide and account for a roughly equal share of global greenhouse gas emissions.

 According to Pew Research:

In 2008 Barack Obama won 88 of the 100 most populous counties; in his re-election bid four years later he won 86. ... A 2014 Pew Research Center report on political polarization found that liberals are about twice as likely as conservatives to live in urban areas, while conservatives are more concentrated in rural areas.

So, Democrats cause global warming. Which means America can easily solve its global warming problem: just kill all the Democrats. Problem solved. And our overpopulation problem goes away at the same time. Government efficiency at its finest.