Trees in urban areas provide benefits for people, including decreased temperatures and improved air quality, according to new research from Washington state.

The Greening Research in Tacoma initiative measured air temperatures across a neighborhood in the city to understand the effects of urban trees.

Ailene Ettinger, qualitative ecologist for The Nature Conservancy in Washington and the study's lead author, said temperatures were as much as 18 degrees lower in areas with trees. Ettinger noted trees are essential to mitigate the effects of climate change.

"They reduce the probability of extreme heat occurring," Ettinger explained. "The kind of heat that can be harmful for human health, and can also just reduce the ability of people to do their work if they're working outside."

The Greening Research in Tacoma initiative is a partnership of The Nature Conservancy in Washington, University of Washington, Tacoma Tree Foundation and Tacoma Urban Forestry program. The study was published in the journal Scientific Reports.

Lowell Wyse, executive director of the Tacoma Tree Foundation, said urban trees are also an environmental justice issue. He pointed out the South Tacoma neighborhood where the study took place has half the canopy coverage of the rest of the city, and is also more racially and ethnically diverse.

"There's a growing awareness that the way the city's designed isn't fair for everybody," Wyse observed. "People that live in this neighborhood really care about making a change on all those fronts - environmental, social and economic."

Wyse added the work has gained greater urgency since the 2021 heat wave in the Northwest, which killed eight people in Tacoma, including one in the neighborhood studied.

"It's kind of becoming a life-and-death issue here to understand the urban heat-island effect, and start making investments in shade and cooling resources in these neighborhoods that are suffering the most from those kinds of events," Wyse stressed.

The Conservation Fund, which works to protect land and nature across the U.S. has announced it has protected more than 1 million acres of working forests lands across the country, including in Oregon.

The organization's milestone comes as forests are rapidly disappearing -- as many as 13 million acres in the next few decades.

Brian Dangler, director of the Working Forest Fund with The Conservation Fund, said valuable work continues on the protected land which adds to the nearby economy.

"The beauty of these projects is that the receipts from the timber, the sustainable management of forests, timber harvest really helps local folks to keep the schools going, the fire department, the local services," he explained.

He added The Conservation Fund has helped protect forestland in the Columbia River Gorge near Hood River and Deep River Woods near Astoria. Nationwide, it's secured forests in 21 states. The organization uses community and private partnerships to protect nature.

Dangler said large, intact forests support jobs in rural communities, through logging, trucking, building roads and other activities.

"And, of course, the wildlife habitat that goes along with it. Good forest management usually improves wildlife habitat for lots of different species," he continued.

Dangler noted development is one of the biggest threats to forests, and said it's important to keep forestlands as units rather than smaller parcels.

"Eventually more and more development just nibbles away at these large, intact forests. It's very important for them to be large in landscape," he said. "It's like Humpty Dumpty -- you can't put it back together again when it gets fragmented so much."

Summer in Indiana produces a variety of festivals, outdoor concerts, and athletic competitions.

These attractions produce large crowds and hundreds of pounds of trash and food containers which could end up in a landfill.

"The Indianapolis Event Waste Guide" is an environmentally-focused publication with resources and contact information for nonprofits and vendors wanting to reduce waste.

Ecosystems Events Owner Julia Spangler said the publication is for events attended by a dozen or thousands of people.

"Bringing people together, especially if you're feeding them or decorating, often generates waste," said Spangler. "So, this guide is all about first, how to reduce the amount of waste generated in the first place, and then how to keep that waste out of the landfill."

Spangler described the publication as a "one-stop shop starting point" for recycling or composting food, waste, leftover lanyards, or banners.

In 2021, Indiana collected more than nine million tons of garbage, refuse, office waste and other similar materials.

The Indianapolis Event Waste Guide was released to coincide with the U.S. Olympic swimming trials held in Indianapolis last month.

As the state continues to draw large crowds at amateur and professional athletic competitions, event planners are looking for ways to reduce their carbon footprint.

Sustain Indy Community Manager, and City of Indianapolis Office of Sustainability Community Engagement Manager Lyndsay Trameri noted the guide is intended for local residents and out-of-town organizers.

"Just because you're planning an event in the town you live in," said Trameri, "that doesn't mean you're aware of all the different contacts and organizations that are local that can help you decrease your footprint."

Trameri added that city leaders have a plan for Indianapolis to be net zero emissions by 2050. Trameri said you can download the free guide on the Visit Indy website.

Weather researchers at Iowa State University say a shifting climate and warmer ocean temperatures are partially responsible for a record number of tornadoes this spring.

More than 100 were reported in Iowa, in May alone.

Eleven hundred tornadoes were reported regionwide in May -- from Texas to Minnesota, and from West Virginia to Georgia. That's more than twice the 30 year average.

One of the fiercest killed five people and injured dozens in rural Greenfield, Iowa.

ISU Severe Weather Meteorologist and Professor of Meteorology William Gallus said extreme heat from a changing climate has increased ocean temperatures, and is one contributing factor to this year's storms.

"Mexico and Texas were having record high temperatures," said Gallus. "That was allowing the Gulf of Mexico to rapidly warm up, get much warmer than normal, which means that is our main source of energy."

Gallus said the weather pattern known as El Niño -- characterized by warmer ocean temperatures that prompt more precipitation and provide fuel for severe weather -- is now shifting to La Niña, marked by cooler seas and drier weather.

That could cause the rest of the tornado season to be less active.

Gallus said the high number of tornadoes in the region was unusual, since climate change models predict Iowa and neighboring states west of the Mississippi should being seeing below average numbers, which they have in recent years.

"The long-term trend has been for tornadoes to be hitting more places east of the Mississippi River," said Gallus.

Gallus said data show tornadoes occurring on fewer days each year, but coming in clusters and with greater intensity.

He says some storms that have been listed as Category F3 are probably F5's, but measurement methods in some areas are not adequate to gauge the storms' intensity.




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