Russia-Ukraine

As wars grind on in Ukraine and Gaza, another location ravaged by conflict is taking steps to implement a historic peace agreement. From the mid-1960s through 2016, Colombia was torn by conflict between the government, leftist guerrilla movements and right-wing paramilitary groups. Now the government and rebels are working to carry out a sweeping accord that addresses many critical sectors, including environmental damages and restoration. University of Notre Dame researchers Richard Marcantonio and Josefina Echavarria Alvarez study peace and conflict issues, including their effects on the environment. They currently are advising negotiations between the Colombian government and several rebel factions over wartime damage to soil, water and other natural resources. They explain that while Colombia’s transition from war to peace has been difficult, the accord offers a model for addressing the ravages of war in places such as Gaza and Ukraine. Is it common for peace settlement...

When an explosion breached the Kakhovka Dam in Ukraine on June 6, 2023, much analysis focused on near-term impacts, including the flooding of the city of Kherson, threats to the Zaporizhzhia Nuclear Power Plant and consequences for Ukrainian military forces’ expected spring offensive against Russian troops. But the most severe long-term effects will fall on Southeast Ukraine’s farmers. Villages there were flooded. Roads, train tracks and irrigation canals were washed away. Crops in fields and orchards in the Kherson and Zaporizhzhia region were inundated, then left to shrivel after the water drained. The long-term ecological disaster will unfold over decades to come. Crimea, once a region known for its sunny beaches and rice fields, could dry up without irrigation. We are a U.S. political scientist with research expertise on the post-Soviet region and a Ukrainian economist who studies agriculture. While the long-term effects of the dam break are difficult to calcu...

The Biden administration has agreed to provide Ukraine with depleted uranium shells to equip M1A1 Abrams tanks that the U.S. is sending there. Britain has already delivered tanks to Ukraine equipped with depleted-uranium shells. DU munitions, developed in the 1970s, are not nuclear weapons and do not produce a nuclear explosion. But soldiers or civilians can be exposed to the uranium, either in combat or afterward. Health physicist Kathryn Higley explains what depleted uranium is and what’s known about potential health and environmental risks. What is depleted uranium? Uranium, symbolized by the letter U, is a naturally occurring element that is radioactive. Natural uranium is composed primarily of three isotopes: U-234, U-235 and U-238. These isotopes are all uranium and have the same chemical characteristics, but they have slightly different masses, as indicated by the numbers 234, 235 and 238. Depleted uranium is mainly U-238, with small amounts of other isotopes, in...

For more than six decades, Alaska’s North Slope has been a focus of intense controversy over oil development and wilderness protection, with no end in sight. Willow field, a 600-million-barrel, US$8 billion oil project recently approved by the Biden administration – to the outrage of environmental and climate activists – is the latest chapter in that long saga. To understand why President Joe Biden allowed the project, despite vowing “no more drilling on federal lands, period” during his campaign for president, some historical background is necessary, along with a closer look at the ways domestic and international fears are complicating any decision for or against future oil development on the North Slope. More than just Willow The Willow project lies within a vast, 23 million-acre area known as the National Petroleum Reserve-Alaska, or NPR-A. This was one of four such reserves set aside in the early 1900s to guarantee a supply of oil for the U.S....