The European Space Agency (ESA) is Europe’s gateway to space. Its mission is to shape the development of Europe’s space capability and ensure that investment in space continues to deliver benefits to the citizens of Europe and the world.
Find out more about space activities in our 23 Member States, and understand how ESA works together with their national agencies, institutions and organisations.
Exploring our Solar System and unlocking the secrets of the Universe
Go to topicProtecting life and infrastructure on Earth and in orbit
Go to topicUsing space to benefit citizens and meet future challenges on Earth
Go to topicMaking space accessible and developing the technologies for the future
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The temporal evolution of tropospheric nitrogen dioxide columns as measured by GOME for selected areas from 1996 to 2002. The geographical regions of the USA, Central US East Coast, Western Europe, Poland, Japan, East Central China and Hong Kong are represented. The latter two regions show the greatest increase. The error bars represent the estimated uncertainty for a given year.