Tuesday insights: Supreme Court punts on Baltimore case against Big Oil

Plus, how economic need is ruining Africa's climate hopes

South Africa is heavily dependent on burning coal to generate electricity. Photo: Jon Hrusa/EPA.

. . . . Africa, with its low levels of industrialization, is by far the least polluting continent. But activists are worried that complacency, along with the reality that most of its nations are too poor to spend money on anti-pollution measures or ignore fin…