This Earth Day, the United States, China, and Canada are among more than 170 countries expected to take part in the largest one-day signing of an international agreement in history. The ratification of the climate agreement hammered out at the Paris Conference of Parties (COP-21) last December could be the most significant elevation of environmental issues on the global stage yet.

A couple of weeks ago, the task force Michigan governor Rick Snyder appointed to investigate Flint’s now infamous water crisis issued its long-awaited report.

Iraq has seen its share of calamities in recent years, but none is as dangerous as the impending failure of the Mosul Dam. A breach of the dam will result in a tsunami-like wave that sweeps through cities and hamlets along the Tigris River from Mosul to as far south as Amarah and even Basra. Baghdad would be submerged under five meters of water within four days. Not only do experts estimate the possible fatalities to range from 500,000 to more than 1 million, but consider the logistics of trying to provide electricity, drinking water, food, hospitals, transportation, and diesel for millions of people.

Blackened rivers snake the ring roads of Beijing, carrying pollution and often smelly water from one end of the city to another. The most polluted of these have been dubbed “foul and filthy” rivers (黑臭河) by China’s Ministry of the Environment (MEP) and Ministry of Housing and Urban-Rural Development (MOHURD). However, the government has decided to clean these up – and is enlisting the help of the public to do so.

Though governments have agreed to try to limit global warming to no more than two degrees Celsius above pre-industrial levels, a paper by James Hansen et al. in Atmospheric Chemistry and Physics finds that goal may not prevent major changes on an irreversible and unadaptable scale. Studying the last interglacial period, about 120,000 years ago, when the temperature was less than one degree Celsius warmer than today, Hansen et al. estimate sea level was six to nine meters higher than today.

Post-war countries are among the most difficult policy arenas. The challenge is not only to stop violence and prevent violence from rekindling, but moreover to help countries reset their internal relations on a peaceful path. Increasingly, researchers and practitioners are interested in the potential of natural resources in post-war settings in the hope that good governance and sustainable management can contribute to this reset. Indeed, the international community acknowledged the relevance of the link between peaceful societies and environmental issues by including both in the Sustainable Development Goals.

In the middle of January, Deputy Secretary of Defense Robert Work signed off on one of the potentially most significant, if little-noticed, orders in recent Pentagon history. The directive told every corner of the Pentagon, including the office of the secretary of defense, the joint chiefs of staff, and all the combatant commands around the world, to put climate change front and center in their strategic planning.

Massive droughts and water demands from a world population projected to grow to 9 billion by 2050, translate to food insecurity and lack of water for agriculture. Securing Water for Food sources and invests in a portfolio of innovative solutions that help farmers use water more efficiently and effectively; improve water storage for lean times; and remove salt from water to make more food.