Carbon storage

Every year, Americans buy somewhere between 35 million and 50 million Christmas trees, and many more pull an artificial tree out of storage for the season. In all, about three-quarters of U.S. households typically have some kind of Christmas tree, surveys show. People often ask which is more sustainable – a real tree or an artificial one? It’s a big debate, and the answer depends on who you ask and which factors you consider. A more useful question is: How do I find the most sustainable tree of the kind I want to get? I’m a forestry professor who works on issues of sustainability. There are advantages and disadvantages to both cut trees and artificial trees. Here are some tips to consider for each. Cut Christmas trees require water and maintenance – and careful thought about disposal. 10'000 Hours/DigitalVision via Getty Images If you’re buying a live Christmas tree W...

The Russian invasion of Ukraine launched in February 2022 has sent economic, social and political shock waves around the world. In a newly published policy brief, we and other researchers and conservation scientists describe how these effects extend to biodiversity conservation efforts far beyond Ukraine. Animals, plants and ecosystems don’t recognize political boundaries, so protecting them often requires international cooperation. Over many decades, countries have developed a network of international agreements and arrangements for protecting biodiversity. Now, however, the war at Russia’s hands is delaying a number of those efforts, stopping others, and even sending some into reverse. War and the spoon-billed sandpiper As one example, efforts to save the critically endangered spoon-billed sandpiper (Calidris pygmaea) from extinction are now at risk as a result of the war in Ukraine. Russia’s treeless tundra, in the high Arctic, is the summer home of coun...

Brazil’s president-elect, Luiz Inácio Lula da Silva, was greeted with applause and cheers when he addressed the U.N. climate conference in Sharm el-Sheikh, Egypt, on Nov. 16, 2022. As he had in his campaign, Lula pledged to stop rampant deforestation in the Amazon, which his predecessor, Jair Bolsanaro, had encouraged. Forests play a critical role in slowing climate change by taking up carbon dioxide, and the Amazon rainforest absorbs one-fourth of the CO2 absorbed by all the land on Earth. These articles from The Conversation’s archive examine stresses on the Amazon and the Indigenous groups who live there. 1. Massive losses The Amazon rainforest is vast, covering some 2.3 million square miles (6 million square kilometers). It extends over eight countries, with about 60% of it in Brazil. And the destruction occurring there is also enormous. From 2010 to 2019, the Amazon lost 24,000 square miles (62,000 square kilometers) of forest – the equivalent of...