Granted, Maryland's pension investments aren't going to drive national, let alone global, policy on climate change. But it's certainly prudent to make smarter investments, a choice made easier if corporations were required to publicly reveal more about their carbon footprints. That kind of Wall Street reform is not just socially responsible, it's something investors ought to demand. And who should lead the way? That's the proper role of a U.S. president — to not only seek legislative and regulatory relief but to use the bully pulpit of his or her position to call attention to this enormous environmental threat and rally public support behind reasonable solutions. For the record, one candidate appears qualified and prepared to do so and one does not.