Glendale ranked as the least sustainable city in the U.S. and three other Arizona cities were also named among the 10 worst for environmental efforts in a recent study.
The analysis, conducted by WalletHub, sought to determine which U.S. cities prioritize sustainability and invest most in protecting the environment. Analysts compared the 100 largest U.S. cities across 28 key indicators of environmental friendliness and sustainability, from greenhouse gas emissions per capita and water quality to job opportunities in sustainability.
The indicators were then grouped into four categories: environment quality, transportation habits and initiatives, energy sources and sustainability policies. Each city was assigned a score in every category and the scores were combined to come up with an overall ranking, from the cities leading in green initiatives to those falling behind.
Here’s what environmental challenges are impacting Arizona cities the most, what local solutions could be implemented and simple ways people can contribute, along with a roundup of the most and least environmentally conscious cities in the U.S.
What are the most sustainable cities in America?
These are the 10 most sustainable cities in the U.S., according to WalletHub.
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San Diego
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Washington, D.C.
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Honolulu
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San Francisco
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San Jose, California
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Seattle
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Oakland, California
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Portland, Oregon
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Fremont, California
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Irvine, California
What are the least sustainable cities in America?
Here are the 10 least “green cities,” ranked from least to most sustainable, according to WalletHub.
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Glendale, Arizona
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Hialeah, Florida
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Houston
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Mesa, Arizona
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Baton Rouge, Louisiana
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Gilbert, Arizona
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Chandler, Arizona
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Newark, New Jersey
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Detroit
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Louisville, Kentucky
What policies could be implemented in Arizona cities?
Glendale, Mesa, Gilbert and Chandler rated poorly across all study categories but were ranked especially low for environmental quality indicators like the intensity of the urban heat island effect, the share of green spaces, and air and water quality, among other factors.
Arizona counties are among those expected to be hardest hit by climate change within the next 20 years, with average annual temperatures and the number of days above 90 degrees expected to increase significantly, according to data from the Climate Impact Lab.
Fernando DePaolis, who has a doctorate in urban planning and teaches policy analytics at the Middlebury Institute of International Studies, said implementing climate adaptation policies is pivotal in Arizona cities where the impact of urban heat is expected to be exacerbated by droughts and serious changes in rain patterns, with fewer but more severe rains likely to become the norm.
The urban heat island effect is at the forefront of metro Phoenix’s prolonged and worsening heat, as buildings, roads and other infrastructure absorb and re-emit the sun’s heat. This contributes to higher low temperatures in the mornings, resulting in more record temperatures in the afternoons.
DePaolis said investing in urban reforestation and reducing the density of these heat accumulators would help reduce the number of days above 100 degrees in Arizona cities.
“(These) solutions are, in aggregate, more cost-effective. It is not just a way of being ‘green’; it makes good business sense,” DePaolis said in an email statement.
Phoenix is investing in creating more shaded areas in vulnerable areas, with leaders at the city’s heat office putting up $50 million from local, federal and private funds into the initiative over the next five years.
The “Shade Phoenix Plan” presented in early June is an overhaul of the city’s Tree and Shade Masterplan passed in 2010. The new plan, like the old one, focuses on educating the public about the importance of shade, increasing planted and built shade structures, and preservation and maintenance. The new plan follows a $10 million federal grant the city received in 2023 through the Biden Administration’s Inflation Reduction Act, on top of $4 million from the American Rescue Plan Act the city allocated toward urban tree shade in 2022, plus $300,000 earmarked by Gov. Katie Hobbs in last year’s state budget for the “Trees for Kids” program to create shade at schools.
At spot No. 72, Phoenix also underperformed in WalletHub’s greenest cities ranking, but it was far ahead of the four Arizona cities named among the bottom 10. Phoenix ranked lowest in the transportation category but landed in the top half for sustainability policies.
Tucson, Mesa, Chandler, Peoria and other cities also received large sums of money from the U.S. Forest Service in 2023 as part of Biden’s $1.5 billion urban forestry initiative, which is also part of his Justice40 plan to address the ways climate change will affect minorities and disadvantaged communities the most.
Besides adding more green spaces, here are some more cost-efficient green policies that McCusker and DePaolis said local authorities can implement to effectively foster environmental protection and alleviate the harmful effects of warming, especially in the most vulnerable communities:
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Add more cooling and heat respite centers.
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Create education programs focused on training the next generation of technicians for the developing industries of renewable energy, adaptive transportation and building retrofitting, which is the process of modifying a building after it has been constructed to improve its sustainability performance and amenities.
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Attract renewable energy companies and other green businesses through government incentives, as well as retain these businesses by finding a path to adapt the labor force to the climate crisis.
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Install solar panels and wind power systems in strategic places.
What are simple ways to contribute to building a greener city?
Here are some simple ways people can implement environmental practices without much cost or effort, according to DePaolis and WalletHub analyst Chip Lupo:
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Reduce greenhouse emissions by sharing rides, using public transit, biking, walking and overall using motor vehicles less often.
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Reduce the use of plastic items.
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Wash clothes less often. Wearing your clothes just 20% longer can create “a huge contribution to reducing the extraction of raw materials, manufacturing energy and water use, and transportation impacts,” DePaolis said.
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Buy local. This helps reduce the transportation component of carbon-equivalent emissions.
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Lowering consumption is another way to reduce the carbon footprint in communities across Arizona.
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Consider applying for state incentives to install solar panels, which often come at almost no cost to homeowners of single-family houses.
This article originally appeared on Arizona Republic: This Arizona city is least sustainable in US, new study says