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.
1 New Moon-this is the first phase of the Moon. 2  This phase takes place during the beginning of the Moon's orbit around the Earth. 3  In this phase, the dark side of the Moon is facing Earth, while the bright portion is being lit up by the sunlight on the other side.