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Reducing Emissions at Gas Stations across Japan

New fuel nozzles help contain gasoline evaporation


Across Japan, many gas stations are adopting new technologies to be officially designated as “Clean Air Service Stations.” Clean Air Service Stations are gas stations that have reduced emissions from evaporated gasoline, a significant contributor to air pollution, and the source of gas stations’ particular odor.

Refueling vehicles creates gasoline evaporation

Automobiles are part of many people’s daily lives, but did you know that fueling cars and other vehicles with gasoline causes some of the gas to evaporate into the air? Evaporated gasoline in turn generates harmful photochemical oxidants (Ox) and PM2.5 (particulate matter), both of which cause damage to human health and the environment.

Preventing the release of evaporated gasoline

Conventional fuel nozzles are no designed to collect evaporated gasoline, so the gas is released into the air whenever automobiles are refueled. New types of nozzle technology can reduce emissions by collecting evaporated gasoline during the refueling process. Not only is this new method eco-friendly, but it also helps prevent odor. Japan’s Ministry of Economy, Trade and Industry (METI) aims to promote the new technology to reduce harmful emissions and improve air quality.

“e→AS” certification ranks Clean Air Service Stations

METI worked with industry partners to develop a system, called e→AS (pronounced: ee-as), to promote gas stations equipped with new evaporation-collecting nozzles. The e→AS system evaluates gas stations according to how much evaporated fuel they save, and ranks them into one of four levels. Certified locations are then listed on the e→AS website. METI aims to develop additional assets, including flyers and posters, to encourage drivers to use certified stations.

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Last updated:2018-12-26