In a new paper, the influential climate scientist argues the Earth may be more sensitive to greenhouse gases than previously thought. Others are less sure. Climate scientist James Hansen is ...

Hansen and 17 co-authors argue in a new peer-reviewed paper that warming is accelerating beyond what many climate models show, and that cuts to greenhouse gas emissions—while urgently needed ...

Specifically, Hansen told USA TODAY that the study's main point is that the Earth's climate is "more sensitive" to both greenhouse gases and air pollution than the IPCC realized.

CLIMATEWIRE | Climate scientist James Hansen is frustrated. And he’s worried. For nearly 40 years, Hansen has been warning the world of the dangers of global warming. His testimony at a ...

Thirty-five years ago, NASA climate scientist James Hansen stood in front of Congress with a bold declaration: Humans are causing an increase in greenhouse gas emissions, and it’s changing our ...

This comes from an analysis of climate data led by researcher James Hansen. Advanced ... the expected greenhouse gas warming in the past century has been offset by the cooling effect of ...

James Hansen, the climate ... it would also mean air pollution’s cooling effect has been masking the full extent of ...

The scientist cited a moral obligation to leave his post at NASA and campaign more actively for political and legal efforts to limit greenhouse gas emissions. NASA scientist sounds climate alarm ...

A new study lead by James Hansen, a scientist responsible for raising public consciousness about climate change in the 1980s, suggests global temperatures are increasing faster than expected.

James Hansen, the climate scientist best known for alerting the US Congress to global warming in the 1980s, has redoubled his warnings that we are underestimating the climate impact of declining ...