About 400 billion gallons water is used worldwide each day.From a distance, Earth would be the brightest of the 9 planets. This is because sunlight is reflected by the planet's water.The moon is one million times drier than the Gobi Desert.Earth travels through space at 66,700 miles per hour.The Persian Gulf is the warmest sea. In the summer its temperature reaches 35.6 degrees centigrade.Louisiana loses about 30 square miles (78 square kilometers) of land each year to coastal erosion, hurricanes, other natural and human causes and a thing called subsidence, which means sinking.Only 3% water of the earth is fresh, rest 97% salted. Of that 3%, over 2% is frozen in ice sheets and glaciers. Means less than 1% fresh water is found in lakes, rivers...