3. What is an example of humans over-hunting an animal to extinction?
(SHORT ANSWER)
One example of humans over-hunting an animal to extinction is the passenger pigeon. In the 1800s, large-scale hunting and habitat destruction led to the decimation of the passenger pigeon population. The birds were hunted for their meat and feathers, and their habitats were destroyed for agriculture. By the early 1900s, the passenger pigeon was extinct due to human activities.
4. How did humans help prevent bison from being hunted to extinction?
(SHORT ANSWER)
Humans helped prevent bison from being hunted to extinction through various conservation efforts. In the late 1800s, a few conservationists, such as William Temple Hornaday, brought attention to the decline of bison populations and advocated for their protection. The American Bison Society was formed in 1905 to promote the conservation of bison. Government actions were also crucial in saving the species, as several national parks and reserves were established where bison were protected from hunting. Additionally, captive breeding programs and efforts to reintroduce bison into the wild helped increase their numbers and prevent extinction.
5. What was the impact when humans diverted rivers flowing into the Aral sea and used the water to irrigate farmland?
(SHORT ANSWER)
When humans diverted rivers flowing into the Aral Sea and used the water to irrigate farmland, it caused severe environmental and social impacts. The diversion of water led to a significant decrease in the volume of water reaching the Aral Sea, resulting in the shrinking and near disappearance of the sea. The drastic reduction in water levels disrupted the ecosystem, leading to the extinction of several fish species and the loss of biodiversity. The exposed seabed released toxic chemicals and dust, causing health problems for surrounding communities. The decline of the fishing industry and the loss of water resources also affected the livelihoods of local populations.
6. What is one problem, discussed in the video, with humans using oil as an energy source?
(SHORT ANSWER)
One problem discussed in the video with humans using oil as an energy source is its contribution to climate change. The burning of oil releases carbon dioxide and other greenhouse gases into the atmosphere, which trap heat and contribute to the warming of the planet. This leads to various negative impacts such as rising sea levels, extreme weather events, and disruptions in ecosystems. Additionally, extracting and processing oil can have negative environmental consequences, including habitat destruction, water pollution, and oil spills, which harm wildlife and ecosystems.
7. What are some alternatives to using oil and fossil fuels as an energy source?
(SHORT ANSWER)