Long-term soil analyses from intensively managed tropical rice paddies have revealed an unexpected paradox: although soil organic matter continues to accumulate over time, the amount of nitrogen that rice plants can actually use decreases, leading to a gradual decline in soil fertility. The study also identified severe potassium depletion, highlighting the urgent need for new, integrated approaches to water and nutrient management in tropical rice systems.

On 24 April 2026, the World Meteorological Organization (WMO) announced that the likelihood of an El Niño event developing from mid 2026 has increased. Rapidly rising sea surface temperatures in the equatorial Pacific are becoming evident and are expected to have significant impacts on global temperature and rainfall patterns.

In recent years, the increasing damage caused by typhoons and hurricanes may be linked to unusual changes in ocean conditions. A study published in Science Advances shows that when prolonged anomalously high ocean temperatures—known as marine heat waves—coincide with the rapid intensification of tropical cyclones, the likelihood of causing billion-dollar disasters increases by approximately 60%. As the oceans continue to warm, the need to reassess and strengthen disaster preparedness has become increasingly urgent.

Methane (CH₄) is an extremely potent greenhouse gas, with approximately 80 times the warming potential of carbon dioxide. Since 2019, atmospheric methane concentrations have continued to increase at a high rate. A study published in Science Advances used satellite observation data to quantitatively analyze the factors behind methane growth from 2019 to 2024. The study shows that while emissions from the oil and gas sector and rice cultivation declined, these reductions were offset by increases in emissions from the livestock and waste management sectors, resulting in no substantial overall reduction in global methane emissions.

A recently published paper in Plants, People, Planet investigated how plants evolved mechanisms that allow them to tolerate high temperatures. The study suggests that these traits did not arise suddenly, but instead likely emerged through the gradual accumulation of pre-existing genetic changes. In other words, plants may have been undergoing a long process of “evolutionary preparation” over time.

A recent paper published in Science comprehensively organizes the fundamental challenges facing modern food systems and outlines concrete directions for transformation. From a whole-system perspective, it explores why the transition toward “healthy, sustainable, and equitable” diets has been slow, and how such a shift can be realized.

According to the Copernicus Climate Change Service (C3S), the global average temperature in March 2026 ranked as the fourth highest on record, reaching 1.48°C above pre-industrial levels. This highlights the continued warming trend in recent years and suggests that the pressure on the climate system is becoming increasingly intense.

The timing and duration of summer weather conditions in the midlatitudes are highly significant because they are closely linked to extreme weather events, the phenology of plants and animals, economic activity, ecosystem and human health, droughts and wildfires, as well as energy demand. A recent study published in Environmental Research Letters shows that, relative to the 1961–1990 baseline, summers in the midlatitudes are becoming longer and hotter, and seasonal transitions are occurring more abruptly.

The realization of sustainable food systems is influenced not only by technology and policy but also by socio-economic conditions that vary across regions. A study published in Nature Food systematically reviewed over 1,700 related articles and selected 349 for detailed analysis, examining the role of socio-economic factors in shaping food systems transformations across different regional contexts. The study highlights that income, education, and institutional frameworks significantly influence the behaviors of both producers and consumers, and that distinct regional patterns exist.