(2007) concluded, with very high confidence, that regional temperature trends had already affected species and ecosystems around the world (p. 792). With high confidence, they concluded that climate change would result in the extinction of many species and a reduction in the diversity of ecosystems (p.
Full Answer. Use of the Gregorian calendar keeps the arrival of spring on March 20 or March 21 for most years, though sometimes spring arrives on March 19. According to National Geographic, in addition to the astronomical start of spring, a biological spring begins each year, usually on a different date.
A: The spring season often brings warmer temperatures and new growth, and is celebrated by people around the world with festivals and fairs. Spring is the period of time between the vernal equinox, which falls around March 21 each year, and the summer solstice, which takes place every year on June 21.