The United States has a goal of net-zero carbon emissions by 2050. Without serious changes to lifestyles, that means dramatic investments in green energy. But environmental laws can actually get in the way. Today, our colleagues at NPR's daily economics podcast, The Indicator from Planet Money, compare the threats to two bats on opposite ends of the planet. The bats show the tension between local and global environmentalism and how building a green economy is forcing people to have tough conversations about tradeoffs.