One of the most commonly mentioned and interesting biomes in the world is the desert. Located all over the world in arid regions, they cover more than 18 million square kilometers. Deserts make up approximately 30% of the accessible land surface, making them one of the largest accessible biomes in the world. Most great deserts are centered on latitudes between 20 and 30 degrees north and south of the equator, but they can also be accessed where large mountain ranges produce intense rain shadows. One of the most commonly mentioned and largest deserts is the Sahara, located in North Africa, which covers an incredible 9 million square kilometers. Some tropical parts of the desert biome can experience annual temperatures of 30 degrees Celsius, which is very hot. The cold desert regions of North America, Central Asia and South America can have an average temperature of 15 degrees Celsius with a difference of up to 35 degrees Celsius between July and January. High latitude deserts can experience freezing temperatures in winter. Deserts have a very unique severe moisture deficit, which sets them apart from other biomes and gives them their unique characteristic. Average annual precipitation in a desert biome is less than 50 cm per year but often less than 10 cm per year the further away from the equator one goes. A unique statistic is that the Atacama Desert in Chile receives on average only 0.4 cm of precipitation per year. In some parts of the world, particularly the Eastern Sahara Desert, there may be no significant rainfall for 100 years, making it more difficult for biotic and abiotic elements to survive. Due to the shift of the ITCZ ​​to higher latitudes, the lower latitudes usually receive their rains and also when monsoon precipitation falls...... middle of paper ...... East and West from the United States, we always hear about these strong sandstorms that have huge impacts. ecological disturbances. In areas like Arizona, we can also see summer monsoons. Some challenges and threats remain for desert biomes as global warming continues to increase, increasing drought rates and blocking waterholes. These warmer conditions can turn into an increased spread of the wildfires we always hear about in the media, destroying life on land. When there is a lack of vegetation, you may find grazing animals destroying plants in order to maintain balance and survive. In the western United States we hear about nuclear bomb testing where the waste is dumped in the desert and on testing grounds. Human impacts are so detrimental to this biome that poor irrigation renders these rare soils infertile. Overgrazing is also a human impact due to the