It might seem strange to say that the deep sea, the vast expanse of the world’s oceans beyond the continental shelf, is at risk of conflict and competition. After all, no one lives there, and as is often said, more is known about the surface of the moon than most parts of the ocean floor. But the fact is, even the cold, dark reaches of the ocean are no longer immune to resource competition between the world’s major powers.

Overfishing by foreign fleets in West Africa is leading to devastating social and economic consequences. In a report from the Overseas Development Institute, an independent think tank based in London, researchers use satellite data to assess the scale of two kinds of illegal, unreported, and unregulated fishing: “reefers,” or large-scale commercial vessels receiving and freezing fish at sea and at port, and large refrigerated container ships that are registered in countries with less stringent enforcement regulations than that of the ship’s owners.

How will the 10 billion people expected to be living on Earth by 2050 obtain sufficient and nutritious food? This is one of the greatest challenges humanity faces. Global food systems must supply enough calories and protein for a growing human population and provide important micronutrients such as iron, zinc, omega-3 fatty acids, and vitamins.

This Earth Day weekend, the U.S. Department of State is hosting more than 2,000 coders in more than 40 cities to encourage creative thinking about technological solutions to ocean issues. The third annual Fishackathon could produce new tools for local communities to track long-distance fishing, a growing problem in some places, as China, in particular, scales up its efforts.

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.

Some, especially in the scientific community, get frustrated at the seeming lack of scientific literacy among the general public and policymakers. This is a two-part problem, however. The general public must understand the implications of science and data, yes, but it is also important for the scientific community to effectively convey their work and educate the next generation.

A study published by the Proceedings of the National Academy of Sciences projects future sea-level rise with a new model, providing crucial information for coastal planning and further impetus to cut carbon emissions. Sifting through data on thermal expansion and retreating glaciers, the two leading causes of sea-level rise in the past century, the authors confirm that sea level is rising at an unprecedented rate.