Scientists are worried because they can’t fully explain the big jump, but they think it might mean that carbon absorption by forests, fields and wetlands is slowing down—a major problem for the world.

There's a small chance of very high warming even with moderate future emissions, according to a computer model exploring what could happen in the next thousand years ...

The graph above shows changes in the declining ... have historically offered by absorbing half of human-induced carbon dioxide emissions. "Consequently, achieving safe global warming limits ...