After a hiatus of decades, geoengineering and weather modification are once again hot topics. But is the federal government ready to invest in this research?

Can the carbon dioxide emitted by volcanoes really be considered "missing science" in the climate change debate, as a 2009 bestselling book claimed? No — the real missing science, geologist Terry Gerlach says, is when popular books don't include the most recent or accurate data to support their claims.

Millions of years ago, a large asteroid slammed into what is today northeastern Russia and formed a giant lake. In 2009, scientists traveled to this remote region to drill into the sediments at the bottom of the lake — which could provide an unparalleled record of high-latitude climate change over the last 3.6 million years.

Sea-level rise over the next century will be particularly threatening to some regions of the world, such as the Gulf Coast of the United States — and even within that region, each beach will be affected differently.

An independent review has cleared the climatologists involved in "Climategate" of any wrongdoing. But it does have some strong advice for all scientists regarding the scientific method and openness.

What should scientists say if the truth is they are quite uncertain about what might happen in the future, as is usually the case? It is a real dilemma, but there is a need for plain talk — admitting what scientists don't know and simultaneously telling people how to prepare for natural hazards.

The proposed American Power Act aims to significantly curb the nation’s carbon dioxide emissions, in part through carbon capture and storage (CCS) from coal-fired power plants. But will that be enough?

National income isn't the only factor that should go into calculating a country's GDP, according to a new EARTH feature - environmental sustainability should be part of the equation, too.

More carbon dioxide in the atmosphere also makes the oceans more acidic — and that's bad news for many marine creatures that rely on calcium carbonate shells to survive. But it's not that simple, scientists are discovering: Not all shell-building creatures respond the same way to acidifying seawater.

As the climate changes, warmer conditions are creeping northward — and termites, among other creatures, are likely to expand their territories into higher latitudes. Those areas, however, are currently ill-equipped to handle termites, which could cause billions of dollars in property damages.

We recommend: One of EARTH's regular contributors, Callan Bentley, has a thoughtful post up on his blog about what makes a natural disaster. Click through for the link.

Washington, D.C., has been buried in snow over the last week, prompting many people to ask what that means about global warming. The answer? Nothing: It’s weather, not climate.

Climatologist Michael Mann met the press today at the American Geophysical Union's fall meeting to answer questions about "Climategate" and what those hacked emails really said about climate science.

Is the developed world outsourcing its carbon dioxide emissions? And if so — should we help pay for them?

Sequestering carbon dioxide in underground aquifers may be one way to remove it from the atmosphere. But, once stored underground, will the greenhouse gas stay put? Evidence suggests that the gas mainly dissolves in the water, not the rock — but that should still keep it secure.