Volume 19

Halving nitrogen waste by 2030, a target set by the United Nations for global nitrogen management, supports progress towards the Sustainable Development Goals. The image shows a farmer spreading manure on their field in Klaaswaal, the Netherlands, a country facing severe nitrogen pollution from agriculture.

See He et al. and Chen et al.

Wind erosion features formed around footprints in the snow in front of the ASIG drill camp at Prudhoe Dome, northwestern Greenland. Dating of sediments collected below some 510 m of ice indicate that this approximately 2,500 km2 ice cap disappeared during the early Holocene, when local summer temperatures were ~3–5 °C warmer than modern.

See Walcott-George et al.

Extreme weather events often cause severe damage to ecosystems and infrastructure. The image shows a hailstorm striking Nebraska’s high plains in the USA in September 2018, during which large hailstones damaged property.

See Battaglioli et al.