D．Effective rules have come into effect.

　　B

　　Europe on Thursday launched the first satellite of its Copernicus Earth observation project that will supply valuable images in the event of natural disasters or even a plane crash.

　　The Sentinel­1A satellite, which was sent into Earth's orbit from Europe's spaceport in French Guiana, will be used to monitor sea ice, oil spills and land use and to respond to emergencies such as floods and earthquakes.

　　The Copernicus project, for which the European Union and the European Space Agency (ESA) have committed funding of around 8.4 billion euros ($11.5 billion) until 2020, is described by the ESA as the most ambitious earth observation program to date.

　　“The big step forward is that we can now cover every place on Earth every three to six days，” Volker Liebig, director of ESA's Earth Observation program, said ahead of the launch. “If you want to use images for disaster management support or to find a plane, then you will want the images to be as fresh as possible.”

　　But he cautioned you would first need to know roughly where a plane had crashed, which is not the case with the missing Malaysian Airlines jet.

　　Copernicus also offers new business opportunities. Images can be downloaded free of charge, meaning companies can then use them to help deliver data to farmers on soil conditions or pest infestation, help oil companies decide where to drill new wells or make it easier for insurers to assess the risk of costly floods and fires.

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