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                              THE ESA.  OVERVIEW OF THE EARTH EXPLORER

    Earth Explorers are smaller research missions dedicated to specific aspects of our environment on Earth. Earth Explorer missions focus on the atmosphere , biosphere and interior including land in learning more and the impact that human activity is having on natural Earth processes in general.

     The earth observation in support of a multitude of time-critical services , in this example forest fires and floods.

   On this subject see that I very much about the purpose of the ESA because it will provide for and to promote , for exclusively peaceful purposes, cooperation among European states in their space space research and technology, by integrating the latter of them progressively and completely as possible in the European space program , particularly in regard to the development of applications satellites .

   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 .
 The work of the ESA is to develop the European space program and carry it out .
 ESA 's programs are designed to learn more about Earth, its immediate space environment , the solar system and the Universe.

 Explorers of land have been developed in direct response to the needs of the scientific community and cover a broad scientific issues relating to improving our understanding of the Earth system . They focus on the atmosphere , biosphere , hydrosphere , cryosphere and interior of the Earth , with the overall emphasis on learning more about the interactions between these components and human activity is having influence on natural Earth processes .

ESA is headed by a Director General , who is elected by the Council every four years. Each sector has its own individual research general management and reports directly to the chief executive The current Director General of ESA is Jean- Jacques Dordain .

The biggest environmental problem facing global change is covering not only climate change but also the large-scale impact that a growing world population and continued economic growth is having on the environment.

 Earth Explorers provide an important contribution to the global effort to improve our understanding of the Earth. Also learn more about the interactions between these components and the impact that human activity is having on natural processes Tierra.Acerca this issue of ESA and Overview of Earth Explorers I very much see it well explained and helps us to have a little more knowledge on how the ESA works on this topic and many more and especially the crisis that will pass the land or have gone to all of us is very important because they have been many natural disasters that have affected us worldwide.