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3 days ago · According to the 2019 Global Assessment Report on Biodiversity and Ecosystem Services by IPBES, the biomass of wild mammals has fallen by 82%, natural ecosystems have lost about half their area and a million species are at risk of extinction—all largely as a result of human actions. Twenty-five percent of plant and animal species are ...
3 days ago · First case will be when the acceleration due to gravity is to be found below the surface of the earth, second case will be at the surface and the third case will be at a height greater than radius of the earth, that is above the surface of the earth.
2 days ago · Antarctica is the fifth-largest continent, being about 40% larger than Europe, and has an area of 14,200,000 km 2 (5,500,000 sq mi). Most of Antarctica is covered by the Antarctic ice sheet, with an average thickness of 1.9 km (1.2 mi).
1 day ago · Poland is the fifth-most populous member state of the European Union, with its sixteen voivodeships comprising a total population of over 38 million and covering a combined area of 312,696 km 2 (120,733 sq mi).
1 day ago · If emissions of CO 2 stopped abruptly and there was no use of negative emission technologies, the Earth's climate would not start moving back to its pre-industrial state. Temperatures would stay at the same high level for several centuries. After about a thousand years, 20% to 30% of human-emitted CO 2 would remain in the atmosphere. The ocean ...
2 days ago · Modern humans evolved in Africa around 300,000 years ago and initially lived as hunter-gatherers. They migrated out of Africa during the Last Glacial Period (Ice Age) and had populated most of the Earth by the time the Ice Age ended 12,000 years ago. Soon afterward, the Agricultural Revolution began in the fertile river valleys of West Asia ...
3 days ago · The Americas make up most of the land in Earth's Western Hemisphere and comprise the New World. Along with their associated islands, the Americas cover 8% of Earth's total surface area and 28.4% of its land area.
