Living treаsure in Asiа refers tо а persоn whо has an intangible skills and knowledge which has a great value to the culture.
25.4 Eаrth's Chаnging SystemThe relаtiоnship between CO2 levels and glaciatiоn is cоmplex and interrelated with several other factors, such as climate and atmosphere. Over the course of Earth's history, repeated and dramatic shifts in all these factors have led to mass extinctions and otherwise influenced the course of evolution. Shifting tectonic plates have led to volcanic eruptions that alter the atmosphere and CO2 levels. Earth's climate has been ever-changing with a range of temperatures and rainfall over Earth's history. The last Snowball Earth event, a phenomenon in which the Earth was covered in ice from pole to pole, resulted in a massive extinction of species. During this time, the equator did not exceed a temperature of -20 degrees Celsius. The snow reflected the sunlight from its surface, which prevented it from melting. During the last 2 million years, cold periods led to glaciation and a drop in sea level. As a result, a land bridge formed between Asia and North America. Humans and other animals migrated between the once-disconnected continents. A connection between Australia and southeast Asia also allowed for migration. Understanding when land-masses were connected and which species existed at the time is critical in explaining the evolution of the diversity of life on Earth. Living organisms have also substantially altered the atmosphere, as discussed in section 25.5. The evolution of photosynthesis increased O2 in the atmosphere. In addition to changes in weathering associated with a hot, wet climate, plate tectonics can also affect weathering and, thus, atmospheric levels of CO2. As a large continent breaks into smaller pieces, more area is exposed to the ocean as a shoreline and becomes wetter. The increased moisture led to increased weathering and decreased atmospheric CO2 concentrations, which decreased surface temperature. Thus increased weathering from continental shifts during the late Proterozoic also contributed to glaciation.Continental motion affected evolution. The movement of tectonic plates has caused the formation and breakup of landmasses, the emergence of mountain ranges, the creation of new coastal regions, and the alteration of ocean currents, among other things. These changes in Earth's surface have profoundly affected the distribution and evolution of life forms.