Saturn is predominately composed of hydrogen and helium, yet doesn't undergo fusion like the Sun due to the lacking mass.
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The Doppler radar uses what is known as the Doppler effect. In essence, the frequency of the radar signal increases when precipitation is moving towards the radar and decreases when precipitation is moving away from the radar. This can be vital in predicting tornadoes or gusts of wind.
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ISIS is a jihadist terrorist militia. It controlled territory where more than ten million people lived, in Iraq and Syria. However, the terrorist movement is also active in other parts of the world, including Libya, Nigeria and Southeast Asia. It is known for its well-funded propaganda on websites and social media, with videos of beheadings of soldiers, civilians, journalists and aid workers, as well as the deliberate destruction of cultural heritage.
The group appears to have been established in the early years of the Iraq war, while developing ties with al Qaeda. Then, it separated from Al Qaeda to form its own organization, with the aim of establishing an Islamic caliphate in the territories that at some point belonged to that religion. That is, from Spain to the Middle East.
Climate change in South Africa is leading to increased temperatures and rainfall variability. Evidence shows that extreme weather events are becoming more prominent due to climate change.This is a critical concern for South Africans as climate change will affect the overall status and wellbeing of the country, for example with regards to water resources. Just like many other parts of the world, climate research showed that the real challenge in South Africa was more related to environmental issues rather than developmental ones.
Answer:River deltas are important in human civilization, as they are major agricultural production centers and population centers. They can provide coastline defense and can impact drinking water supply. They are also ecologically important, with different species' assemblages depending on their landscape position.
