Moody’s Investors Service, one of the top credit rating agencies in the world, warned cities and states in the U.S. that unless they prepare for climate change, the agency could lower their credit ratings, making it harder for them to obtain low-interest bonds.

An estimated 13,000 historic sites could be lost or damaged in the southeastern United States with just 3 feet of sea level rise, according to a new study by a team of archaeologists published in the journal PLOS One. More than 32,000 sites would be at risk if sea levels rise 15 feet.

Worldwide, the United States is one of the biggest greenhouse gas emitters. The Obama administration began efforts to drop those numbers by increasing vehicle fuel economy standards in 2011 and with its Clean Power Plan proposals in 2015.

With global carbon emissions on the rise, wind power continues to be an attractive option for states and countries looking to limit fossil fuel use and increase renewable energy. Wind already accounts for over 5 percent of electricity generation in the United States. However, a number of issues plague the low-carbon energy source, such as complaints from nearby residents about noise and the killing of hundreds of thousands of birds and bats each year that collide with turbine blades.

On a break from his studies in the MIT Media Lab, Anirudh Sharma SM ’14 traveled home to Mumbai, India. While there, he noticed that throughout the day his T-shirts were gradually accumulating something that resembled dirt.

How safe is the water you drink? For the 45 million Americans who get their drinking water from private groundwater wells rather than a public utility, the answer is decidedly murky. The Environmental Protection Agency regulations that protect public drinking water systems don’t apply to privately owned wells, leaving owners responsible for ensuring their water is safe from contaminants.

For the first time, engineers at Caltech have developed an empirical statewide model of the California reservoir network. The model was built from data gathered over a 13-year period that includes the latest drought, allowing researchers to make observations about how 55 of the state's major reservoirs respond to a variety of external conditions as a unified system.

A new study, led by the University of Leeds, found there was less volcanic activity in Iceland when glacier cover was more extensive. As the glaciers melted, volcanic eruptions increased due to subsequent changes in surface pressure.

"Never before have such unequivocal, strong relationships between temperature and emissions of methane bubbles been shown on such a wide, continent-spanning scale.", says biologist Sarian Kosten of Radboud University.

The “social cost of carbon” — an influential figure used by policymakers to weigh the value of efforts that reduce greenhouse gas emissions — is outdated and underestimated. Updated estimates focused on the agricultural sector alone more than double the social cost of carbon, according to analysis from the University of California, Davis, and Purdue University.