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TOKYO: Japan's space agency will launch a satellite later this month to monitor greenhouse gases around the world, officials said yesterday, hoping the data it collects helps global efforts to combat climate change.

The Greenhouse Gases Observing Satellite (GOSAT), to be launched on Jan 21, will enable scientists to calculate the density of carbon dioxide and methane from 56,000 locations on the Earth's surface, the Japan Aerospace Exploration Agency (JAXA) said.

The coverage compares with just 282 land-based observation sites as of last October, said Takashi Hamazaki, manager of the 35 billion yen ($372.9 million) JAXA project.