HElP PLS NEED ASAP!!What causes increased amounts of algae and plants to grow on top of the Chang Jiang in China, and what are the effects of this algae?

The 20th of Janaury 1986, President Reagan oficialized that the „Martin Luther King’s day” will be the third Monday of each Janaury, very close of MLK’s birthday (Janaury 15th), althought it was signed three years earlier. Martin Luther King was the main character against the violence during the protest of the civil rights, supporting the no racial descrimination inside the federal and state legislation. He was murdered because of it, and the national holiday in his honor campaign started by then. So it was not Bush who proclaim this national holiday, but Reagan.