Since 1940, the amount of fresh water used by humanity has roughly quadrupled as world population has doubled. Some water experts estimate the practical upper limit of usable renewable fresh water lies between 9,000 and 14,000 cubic kilometers yearly. That suggests a second quadrupling of world water use is unlikely.
First Quarter Moon and The Moon Phases. First Quarter Moon. The first quarter moon (often called a âhalf moonâ), happens when the moon is at a 90 degree angle with respect to the Earth and Sun. So we are seeing exactly half of the moon illuminated and half in shadow. Each lunar cycle begins with a new moon.
The Quarter Moon is the Same as a Half Moon. The quarter Moon is also called a âhalf Moonâ because it looks like the Moon is only half litâon one side of the Moon during the first quarter and on the other side during the third quarter because the Moon is on the other side of Earth. The third quarter usually happens around day 22 (twenty-two). A half Moon has something to offer: Only a half Moon aims its terminator, the day-night line that is home to all the juicy detail, straight at us.