Creation Covenant Alliance

Here’s Why Ash Trees are Dying Worldwide

Ash trees, crucial for urban cooling, face a significant threat from emerald ash borers, which could increase city temperatures.
Emerald ash borers fallen from an ash tree after pesticide injection. | Photo by ziggy1/iStock

Emerald Ash Borers Contribute to Rising Urban Temperatures

Emerald ash borers fallen from an ash tree after pesticide injection. | Photo by ziggy1/iStock

The ash tree, although not as iconic as the maple or as majestic as the oak, is a significant contributor to North American urban landscapes. In cities such as Dallas and Chicago, ash trees comprise about 13% and 17% of all city trees respectively. By providing shade and evaporating water through their leaves, they help mitigate extreme heat in urban areas.

However, the ash tree population faces a significant threat from the invasive emerald ash borer. These tiny insects lay their eggs in the tree’s bark and can kill an ash tree within a few years. According to the US Department of Agriculture, this bug has spread to 36 states, DC, and five Canadian provinces, decimating millions of ash trees. Recent research suggests that the loss of these trees could exacerbate rising temperatures in urban areas.

Ecologist Emma Hudgins explains that the bugs lay their eggs under the tree’s bark, where the larvae chew around, disrupting the tree’s nutrient and water transport. “It essentially cuts off the circulation of the tree,” Hudgins states.

Chicago, one of the first major American cities to encounter the ash borer in 2002, has seen devastating results. A report by the local Morton Arboretum indicates that the ash tree population in the Chicago area dropped from about 13 million in 2010 to under 7 million by 2020, with 4 million more trees either dying or already dead.

Urban areas naturally experience higher temperatures than rural areas due to the heat absorption properties of concrete and asphalt. Trees help to mitigate this effect by blocking sunlight and dispersing heat. The loss of ash trees could therefore contribute to higher urban temperatures. A 2019 study found that in US counties with emerald ash borers, average monthly temperatures increased by 0.09°F, and max monthly temperatures increased by 0.28°F after the insects appeared.

Efforts are being made to slow the spread of the ash borer and replace lost ash trees. Climatewire reports potential support from federal funding. Horticulturist Nathan Maren from the Morton Arboretum in Chicago suggests the need for planting diverse tree species, and building resilient and sustainable urban forests. The Morton Arboretum is also researching ash tree varieties that may be more resistant to the ash borer.

Related topics: climate change, urban planning, land use and planning, federal climate policy

Original Story at www.sierraclub.org

Trending News

Mississippi River Faces Persistent Saltwater Intrusion, Region Seeks Long-Term Solutions



For the third consecutive year, the Mississippi River is experiencing significant saltwater intrusion, prompting local communities and environmental experts to search for sustainable solutions. This recurring issue arises as the river’s flow decreases, allowing saltwater to move upstream and threaten drinking water supplies. The U.S. Army Corps of Engineers is actively involved in addressing this problem, employing temporary measures like saltwater barriers to mitigate the impact on affected areas.



Saltwater infiltration poses serious risks to public health and agriculture, as freshwater sources become compromised. The situation is exacerbated by prolonged periods of drought, which have reduced freshwater flow in the Mississippi River. According to the National Weather Service, drought conditions have worsened due to climate change, increasing the frequency and severity of saltwater intrusion events.



Local authorities are collaborating with federal agencies to explore permanent solutions. Among the proposed strategies are enhanced levee systems and improved water management techniques. The U.S. Army Corps of Engineers is evaluating the feasibility of long-term infrastructure projects to prevent further saltwater encroachment. Additionally, community leaders are advocating for increased funding to support these initiatives and safeguard the region’s water resources.



The impact of saltwater intrusion extends beyond drinking water concerns, affecting local ecosystems and agricultural productivity. Farmers in the region have reported crop damage due to elevated salinity levels in irrigation water. The Natural Resources Conservation Service is working with farmers to implement adaptive practices, such as planting salt-tolerant crops and improving soil management techniques.



As the Mississippi River continues to face challenges from saltwater intrusion, stakeholders emphasize the importance of collaborative efforts and innovative solutions. The ongoing threat underscores the need for comprehensive planning and investment to protect one of America’s most vital waterways from the impacts of climate change and environmental stressors.

November 19, 2024



Environmental activists have raised concerns over the fossil fuel sector’s significant impact on COP29, the latest United Nations Climate Change Conference. Activists argue that the industry’s presence diverts focus from critical climate actions.



The conference, designed to promote global climate agreements, faces criticism for allowing fossil fuel companies to participate extensively. Environmental groups claim these companies undermine efforts to reduce carbon emissions and transition to renewable energy sources.



According to Climate Action Network, fossil fuel representatives have increased their lobbying activities, aiming to weaken climate policies. These industries allegedly influence negotiations, leading to watered-down commitments that fail to address the urgency of climate change effectively.



Experts suggest that the influence of these companies stems from financial contributions and longstanding relationships with decision-makers. Critics argue that this affects the conference’s ability to enforce meaningful climate change regulations.



During the event, several protests highlighted the need for transparency and a stronger focus on sustainable energy solutions. Activists are calling for increased participation of renewable energy stakeholders in future conferences.



The controversy surrounding fossil fuel involvement at COP29 underscores the ongoing challenge of balancing industrial interests with the global imperative to combat climate change.



November 19, 2024