{"id":4024,"date":"2026-02-13T04:42:13","date_gmt":"2026-02-13T04:42:13","guid":{"rendered":"https:\/\/www.europesays.com\/ch\/4024\/"},"modified":"2026-02-13T04:42:13","modified_gmt":"2026-02-13T04:42:13","slug":"zurich-residents-cut-co%e2%82%82-emissions-at-home-flying-erased-the-gains","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/ch\/4024\/","title":{"rendered":"Zurich residents cut CO\u2082 emissions at home. Flying erased the gains."},"content":{"rendered":"

\"Illustration<\/p>\n

Air travel remains one of the most carbon-intensive activities, highlighting the growing contradiction between frequent flying and climate goals in Switzerland. <\/p>\n

Illustration: Kai Reusser \/ SWI swissinfo.ch <\/p>\n

Zurich residents fly more than 10,000 kilometres a year on average. Those flights cause more climate pollution per person than all the heating systems, cars, buses and energy used inside the city combined.\u00a0\n<\/p>\n

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Generated with artificial intelligence. <\/p>\n

This content was published on <\/p>\n

January 21, 2026 – 09:00\n<\/p>\n

For years, Zurich officials have touted their city\u2019s climate progress. They say it is on track to reach net zero for territorial emissions by 2040. But outside of the city\u2019s borders, Zurich residents are contradicting these gains.\u00a0<\/p>\n

According to Zurich\u2019s latest interim climate report (called the Netto-Null-Zwischenbericht) around 16% of residents\u2019 climate footprint is produced within the city of Zurich itself. The remaining 84% comes from indirect, consumption-based emissions generated abroad. <\/p>\n

Taken together, these emissions amount to around 11.9 tonnes of CO\u2082-equivalent per person per year \u2013 a roughly 20% increase from 1990. The increase is driven primarily by outside emissions \u2013 imported goods and services. Of all these, aviation is the single largest contributor, accounting for roughly 50% more CO2 on average than all of residents\u2019 activities inside the city.<\/p>\n

\"Stacked<\/p>\n

Most of Zurich residents\u2019 climate footprint comes from indirect emissions such as travel, consumption and imported goods rather than emissions produced within the city. <\/p>\n

Illustration: Kai Reusser \/ SWI swissinfo.ch <\/p>\n

This poses a challenge for local officials. The government is limited in what it can regulate outside of its boundaries, leaving personal action as the primary way to address pollution.\u00a0<\/p>\n

\u201cZurich\u2019s climate target is reachable,\u201d says Sascha Nick, a physicist and economist who works on consumption and societal transitions at EPFL, the polytechnic institute in Lausanne. \u201cBut they are not going to reach it if they continue doing what they\u2019re doing so far.\u201d<\/p>\n

Measured territorially, Zurich\u2019s emissions story looks like a success<\/p>\n

Within the city of Zurich, direct emissions have fallen steadily in recent years and are now at around 2.2 tonnes of CO\u2082 equivalents per person. That puts Zurich in the upper- middle range of European cities with published climate inventories. In comparison, Copenhagen, a city often cited for aggressive climate action, reported roughly one tonne of CO\u2082 per person in 2024, while Berlin reported around 3.6 tonnes of CO\u2082 per person in the same year.<\/p>\n

\u201cThis confirms that our local measures in buildings, mobility and energy are effective,\u201d says Andreas Hauri, a member of Zurich\u2019s city council and head of the Department of Health and Environment.<\/p>\n

In the skies above the city, however, the picture is different. In 2024, Zurich residents flew an average of 10,500 kilometres per person \u2013 roughly the equivalent of a round-trip flight from Zurich to Dubai each year. That marks an increase of around 600 kilometres over the year before. Emissions from flights rose by roughly 110 kilograms of CO\u2082-equivalent per resident. <\/p>\n

Flying now releases around 3.2 tonnes of CO\u2082-equivalent per person. This exceeds a similar measurement conducted in Geneva in 2019, which found the per-capita emissions from air travel were 2.3 tonnes on average. It also exceeds what climate science considers compatible with the Paris Agreement. To stay on a 1.5\u00b0C pathway, average per-capita emissions from all sources combined would need to fall to around 2.7 tonnes per year by 2035.<\/p>\n

\n More<\/p>\n

\"A<\/p>\n

More <\/p>\n

Climate adaptation\n <\/p>\n

Living within planetary limits: Zurich\u2019s 2,000-watt experiment <\/p>\n

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This content was published on <\/p>\n

Dec 1, 2025 <\/p>\n

Zurich is home to a unique housing cooperative meant to model sustainable living. A decade on, some residents have found changing their habits to be more challenging than expected.\u00a0 <\/p>\n

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Read more: Living within planetary limits: Zurich\u2019s 2,000-watt experiment
\n <\/a><\/p>\n

The emissions Zurich cannot regulate<\/p>\n

City officials say aviation emissions are the result of structural conditions rather than a lack of awareness. Flying is relatively cheap and easily accessible. Zurich residents\u2019 high purchasing power and the city\u2019s international connections amplify the effect.<\/p>\n

Unlike buildings, heating systems or cars, flying largely escapes municipal policy provisions. The city can only attempt to limit flying through awareness campaigns and the promotion of alternatives such as international rail and night trains \u2013 options that depend largely on national and international investment. <\/p>\n

\"Bar<\/p>\n

Flying from Zurich to Berlin produces significantly higher greenhouse gas emissions per person than travelling by car or train. <\/p>\n

Illustration: Kai Reusser \/ SWI swissinfo.ch <\/p>\n

Personal changes could have a sizeable effect. When flying largely stopped during the Covid lockdowns, Zurich residents\u2019 overall climate footprint dipped.<\/p>\n

\u201cThe Covid years give us a sense of the scale,\u201d Sascha Nick of EPFL says. \u201cThey show roughly how far current levels of flying would have to come down if emissions were to fall in a sustained way.\u201d<\/p>\n

Nick and his co-authors estimate that aligning air travel with climate goals would require passenger kilometres to fall to levels last seen in the 1980s, when average air travel per person was roughly seven times lower than today.<\/p>\n

Efficiency gains in air travel are unlikely to be enough to drop emissions to sustainable levels. More efficient aircraft and increased use of sustainable aviation fuels would not reduce flight emissions to even 1990 levels by mid-century, according to an analysis Zurich officials commissioned.<\/p>\n

How Zurich calculates individual emissions<\/p>\n

Many cities have residents who fly frequently, but Zurich is among the few cities to produce a measurement that calculates individual carbon emissions so precisely. The city combines direct atmospheric CO\u2082 measurements with a detailed consumption-based emissions inventory.<\/p>\n

As part of the European ICOS Cities research project, scientists at the Swiss Federal Laboratories for Materials Science and Technology (EMPA) installed high-precision sensors around Zurich that measure how much CO\u2082 the city emits.<\/p>\n

Emissions that occur outside the city, so called indirect emissions, are estimated using detailed data on residents\u2019 spending, travel behavior and supply chains.<\/p>\n

\u201cReliable emissions data based on atmospheric observations are crucial to support the city\u2019s net-zero action plan,\u201d says Lukas Emmenegger, who leads Empa\u2019s CO\u2082 measurement work in Zurich.<\/p>\n

Zurich was one of three pilot cities in the ICOS Cities project \u2013 alongside Paris and Munich \u2013 that helped develop new urban CO\u2082 monitoring methods. Although the official pilot phase is concluding, researchers involved aim to use the tools and lessons from the project to support other cities in setting up similar monitoring systems.<\/p>\n

\n More<\/p>\n

\"On<\/p>\n

More <\/p>\n

Climate solutions\n <\/p>\n

Hi-tech CO2 sensors help Zurich track 2040 net-zero goal <\/p>\n

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This content was published on <\/p>\n

Feb 20, 2025 <\/p>\n

Zurich is taking part in an innovative European pilot project, alongside Paris and Munich, aimed at changing how cities monitor their climate action. <\/p>\n

<\/p>\n

Read more: Hi-tech CO2 sensors help Zurich track 2040 net-zero goal
\n <\/a><\/p>\n

Why the gap matters<\/p>\n

Zurich\u2019s situation shows how local efficiency efforts need to be matched by behavioral changes.\u00a0<\/p>\n

On a consumption basis, Switzerland ranks among the highest-emitting countries in the world. In 2023, emissions linked to what Swiss residents consume amounted to about 13.3 tonnes of CO\u2082 per person, placing the country alongside South Korea and Australia, and above Canada, Taiwan and Luxembourg, among other countries. Only a few nations \u2013 including the United States and Belgium, as well as several energy-exporting states \u2013 recorded higher per-capita consumption emissions.\u00a0<\/p>\n

For a country that imports much of what it consumes, this imbalance is structural. As territorial emissions fall, emissions linked to what residents consume abroad play an increasingly decisive role in whether Switzerland\u2019s overall climate impact actually declines.\u00a0<\/p>\n

\u201cOnce you focus only on what happens inside the city or the country, emissions can look like they are going down, while the overall impact does not,\u201d Nick says. \u201cAt that point, consumption becomes decisive.\u201d\u00a0<\/p>\n

What is the ICOS Cities project? <\/p>\n

ICOS Cities was a European pilot project testing new ways to measure urban CO\u2082 emissions.\u00a0<\/p>\n

Zurich, Paris and Munich served as pilot cities, combining atmospheric measurements with emissions inventories.\u00a0<\/p>\n

The project aimed to develop methods other cities can use, not just city-specific studies.\u00a0<\/p>\n

The pilot phase has ended, and Zurich plans to integrate the approach into its long-term climate strategy.\u00a0<\/p>\n

Edited by Gabe Bullard\/sb<\/p>\n

Articles in this story <\/p>\n","protected":false},"excerpt":{"rendered":"Air travel remains one of the most carbon-intensive activities, highlighting the growing contradiction between frequent flying and climate…\n","protected":false},"author":2,"featured_media":4025,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[101,454,453,455,456,328,458,460,2691,461,459,51],"class_list":{"0":"post-4024","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-zurich","8":"tag-article","9":"tag-beat-climate-adaptation","10":"tag-beat-climate-solutions","11":"tag-beat-emissions-reduction","12":"tag-energy-saving","13":"tag-environmental-politics","14":"tag-global-warming","15":"tag-multi","16":"tag-population","17":"tag-production-type-original","18":"tag-renewable-energy","19":"tag-zurich"},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/ch\/wp-json\/wp\/v2\/posts\/4024","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/ch\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/ch\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ch\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ch\/wp-json\/wp\/v2\/comments?post=4024"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/ch\/wp-json\/wp\/v2\/posts\/4024\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ch\/wp-json\/wp\/v2\/media\/4025"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/ch\/wp-json\/wp\/v2\/media?parent=4024"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/ch\/wp-json\/wp\/v2\/categories?post=4024"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/ch\/wp-json\/wp\/v2\/tags?post=4024"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}