Search results
Results from the WOW.Com Content Network
The period since 1950 has brought "the most rapid transformation of the human relationship with the natural world in the history of humankind". [107] Through 2018, humans have reduced forest area by ~30% and grasslands/shrubs by ~68%, to make way for livestock grazing and crops for humans. [108]
Human history is the record of humankind from prehistory to the present. Modern humans evolved in Africa around 300,000 years ago and initially lived as hunter-gatherers.They migrated out of Africa during the Last Ice Age and had spread across Earth's continental land except Antarctica by the end of the Ice Age 12,000 years ago.
A reconstruction of human history based on fossil data. [194] It is more difficult to establish the origin of language; it is unclear whether Homo erectus could speak or if that capability had not begun until Homo sapiens. [125]: 67 As brain size increased, babies were born earlier, before their heads grew too large to pass through the pelvis.
In 1996, Wackernagel and Rees published the book Our Ecological Footprint: Reducing Human Impact on the Earth. [ 15 ] The simplest way to define an ecological footprint is the amount of environmental resources necessary to produce the goods and services that support an individual's lifestyle, a nation's prosperity, or the economic activity of ...
Byju's is an education tutoring app that runs on a freemium model, [30] with free access to content limited for 15 days after the registration. [30] [31] It was launched in August 2015, [32] offering educational content for students from classes 4 to 12. [33]
Human overpopulation (or human population overshoot) is the idea that human populations may become too large to be sustained by their environment or resources in the long term. The topic is usually discussed in the context of world population , though it may concern individual nations, regions, and cities.
In the year 2015, 1.8 million people world wide died because of water pollution and over 1 billion people became ill. [8] Low-income and third-world communities are especially endangered, because they often live close to industries with high emission. [ 8 ]
Americans constitute less than 5% of the world's population, but produce roughly 25% of the world's CO 2, [32] and generate approximately 30% of world's waste. [ 33 ] [ 34 ] In 2007, China overtook the United States as the world's biggest producer of CO 2 , [ 35 ] while still far behind based on per capita pollution (ranked 78th among the world ...