This is ALL THINGS CONSIDERED from NPR News. I'm Melissa Block.
AUDIE CORNISH, HOST:
And I'm Audie Cornish. Today at noon, America's oldest working clock tower rang out for the first time since the 1800s.
(SOUNDBITE OF BELL RINGING)
CORNISH: Old South Meeting House in Boston was a Puritan gathering place. Ben Franklin was baptized there and the Boston Tea Party was planned there, but the belfry has been silent since 1876, after the brick building was nearly destroyed in the great Boston fire.
An Indian street dweller prepares food on the streets of Kolkata. A growing number of scientists say that reducing black carbon — mostly soot from burning wood, charcoal and dung — would have an immediate and powerful impact on climate.
Politically, climate change is off this year's campaign agenda. Jobs, the economy and social issues are front and center.
But scientists are working as hard as ever to figure out how much the Earth is warming and what to do about it. Some now say it's time for a new strategy, one that gets faster results.
Talk to Durwood Zaelke, for example. Zaelke is a grizzled veteran of the climate wars: He was in Kyoto in 1997 when the world's nations drafted a treaty promising to curb warming, and he has watched that promise fizzle while the planet's temperature continues to rise.