Download - Unit 12. human impact in ecosystems
![Page 1: Unit 12. human impact in ecosystems](https://reader034.vdocuments.us/reader034/viewer/2022051400/54bca8804a7959b64b8b45df/html5/thumbnails/1.jpg)
UNIT 10. Human impact in Ecosystems
![Page 2: Unit 12. human impact in ecosystems](https://reader034.vdocuments.us/reader034/viewer/2022051400/54bca8804a7959b64b8b45df/html5/thumbnails/2.jpg)
VOCABULARY
• Overexplotaition• Land occupation• Flood• Draught• Raising• Trapping• Crop• Pest• Hunger• Need• Loss• Greenhouse efect• Landfill• Buried• Burnt
![Page 3: Unit 12. human impact in ecosystems](https://reader034.vdocuments.us/reader034/viewer/2022051400/54bca8804a7959b64b8b45df/html5/thumbnails/3.jpg)
In nature all things are recycled
![Page 4: Unit 12. human impact in ecosystems](https://reader034.vdocuments.us/reader034/viewer/2022051400/54bca8804a7959b64b8b45df/html5/thumbnails/4.jpg)
Recycling….
Water cycle
Biomass cycle
Energy cycle
![Page 5: Unit 12. human impact in ecosystems](https://reader034.vdocuments.us/reader034/viewer/2022051400/54bca8804a7959b64b8b45df/html5/thumbnails/5.jpg)
Humans change everything badly
![Page 6: Unit 12. human impact in ecosystems](https://reader034.vdocuments.us/reader034/viewer/2022051400/54bca8804a7959b64b8b45df/html5/thumbnails/6.jpg)
How?
![Page 7: Unit 12. human impact in ecosystems](https://reader034.vdocuments.us/reader034/viewer/2022051400/54bca8804a7959b64b8b45df/html5/thumbnails/7.jpg)
What have we done?
Pollution Land occupation
Overexploitation
Human impact on the environment
![Page 8: Unit 12. human impact in ecosystems](https://reader034.vdocuments.us/reader034/viewer/2022051400/54bca8804a7959b64b8b45df/html5/thumbnails/8.jpg)
Research: Human impact on the environment
Discuss you understand these terms
![Page 9: Unit 12. human impact in ecosystems](https://reader034.vdocuments.us/reader034/viewer/2022051400/54bca8804a7959b64b8b45df/html5/thumbnails/9.jpg)
Climate change
![Page 10: Unit 12. human impact in ecosystems](https://reader034.vdocuments.us/reader034/viewer/2022051400/54bca8804a7959b64b8b45df/html5/thumbnails/10.jpg)
![Page 11: Unit 12. human impact in ecosystems](https://reader034.vdocuments.us/reader034/viewer/2022051400/54bca8804a7959b64b8b45df/html5/thumbnails/11.jpg)
http://www.epa.gov/climatechange/kids/basics/index.html
![Page 12: Unit 12. human impact in ecosystems](https://reader034.vdocuments.us/reader034/viewer/2022051400/54bca8804a7959b64b8b45df/html5/thumbnails/12.jpg)
![Page 13: Unit 12. human impact in ecosystems](https://reader034.vdocuments.us/reader034/viewer/2022051400/54bca8804a7959b64b8b45df/html5/thumbnails/13.jpg)
Effects of Climate Change
![Page 14: Unit 12. human impact in ecosystems](https://reader034.vdocuments.us/reader034/viewer/2022051400/54bca8804a7959b64b8b45df/html5/thumbnails/14.jpg)
Effects of Climate Change
![Page 15: Unit 12. human impact in ecosystems](https://reader034.vdocuments.us/reader034/viewer/2022051400/54bca8804a7959b64b8b45df/html5/thumbnails/15.jpg)
Effects of Climate Change
http://www.epa.gov/climatechange/kids/
![Page 16: Unit 12. human impact in ecosystems](https://reader034.vdocuments.us/reader034/viewer/2022051400/54bca8804a7959b64b8b45df/html5/thumbnails/16.jpg)
Desertification, drought and
flood
![Page 17: Unit 12. human impact in ecosystems](https://reader034.vdocuments.us/reader034/viewer/2022051400/54bca8804a7959b64b8b45df/html5/thumbnails/17.jpg)
• Desertification is a complex process involving multiple natural and human-related causes. In desertification, the productive potential of arid and semi-arid lands falls by 10% or more, and topsoil is lost or degraded.
– Desertification results mainly from a combination of natural climate changes causing prolonged drought and unsustainable human activities, including overgrazing and deforestation.
Overgrazing on marginal lands (top) can extend
desert zones (lower)
![Page 18: Unit 12. human impact in ecosystems](https://reader034.vdocuments.us/reader034/viewer/2022051400/54bca8804a7959b64b8b45df/html5/thumbnails/18.jpg)
Loss of Biodiversity
![Page 19: Unit 12. human impact in ecosystems](https://reader034.vdocuments.us/reader034/viewer/2022051400/54bca8804a7959b64b8b45df/html5/thumbnails/19.jpg)
Biodiversity is the degree of variation of life forms within a given species, ecosystem, biome, or an entire planet. Biodiversity is a measure of the health of ecosystems. Biodiversity is in part a function of climate.
![Page 20: Unit 12. human impact in ecosystems](https://reader034.vdocuments.us/reader034/viewer/2022051400/54bca8804a7959b64b8b45df/html5/thumbnails/20.jpg)
http://www.novamind.com/connect/nm_documents/285
![Page 21: Unit 12. human impact in ecosystems](https://reader034.vdocuments.us/reader034/viewer/2022051400/54bca8804a7959b64b8b45df/html5/thumbnails/21.jpg)
http://www.novamind.com/connect/nm_documents/285
![Page 22: Unit 12. human impact in ecosystems](https://reader034.vdocuments.us/reader034/viewer/2022051400/54bca8804a7959b64b8b45df/html5/thumbnails/22.jpg)
![Page 23: Unit 12. human impact in ecosystems](https://reader034.vdocuments.us/reader034/viewer/2022051400/54bca8804a7959b64b8b45df/html5/thumbnails/23.jpg)
If anything in your dustbin can be reused by somebody else, recycled or repaired it should notbe there!
![Page 24: Unit 12. human impact in ecosystems](https://reader034.vdocuments.us/reader034/viewer/2022051400/54bca8804a7959b64b8b45df/html5/thumbnails/24.jpg)
Waste is Costly• The earth is a closed system. Matter
amoung keeps constance. There are no losses.
• Any nutrients and resources being taken out of the system (and buried in a landfill, or burnt) are resources lost to us.
![Page 25: Unit 12. human impact in ecosystems](https://reader034.vdocuments.us/reader034/viewer/2022051400/54bca8804a7959b64b8b45df/html5/thumbnails/25.jpg)
Examples….To produce one ton of paper, 100 tons of water are used.For every litre of beer, 10 litres of water have been used in the fermenting process.Producing one cellphone requires 75 kg of resources.A toothbrush requires 1,5 kg of resources – coal, oil and water – for its production
![Page 26: Unit 12. human impact in ecosystems](https://reader034.vdocuments.us/reader034/viewer/2022051400/54bca8804a7959b64b8b45df/html5/thumbnails/26.jpg)
Recycling…
![Page 27: Unit 12. human impact in ecosystems](https://reader034.vdocuments.us/reader034/viewer/2022051400/54bca8804a7959b64b8b45df/html5/thumbnails/27.jpg)
Benefits of recycling• reduces the amount of waste going into
landfill sites, saving airspace;• creates jobs and money for schools and
organisations• reduces pollution and litter;• saves raw materials needed to make new
products• reduces the need to import expensive
raw materials
![Page 28: Unit 12. human impact in ecosystems](https://reader034.vdocuments.us/reader034/viewer/2022051400/54bca8804a7959b64b8b45df/html5/thumbnails/28.jpg)
Benefits of recycling• slows down the use of the world’s
non-renewable (oil, coal and iron) and renewable resources (trees)
• reduces energy costs in manufacturing of containers, packaging, etc.
• saves water (used in packaging and product manufacture). Recycling paper uses 50% less water than paper that is made from wood pulp.
![Page 29: Unit 12. human impact in ecosystems](https://reader034.vdocuments.us/reader034/viewer/2022051400/54bca8804a7959b64b8b45df/html5/thumbnails/29.jpg)
![Page 30: Unit 12. human impact in ecosystems](https://reader034.vdocuments.us/reader034/viewer/2022051400/54bca8804a7959b64b8b45df/html5/thumbnails/30.jpg)
1)Why can we say Nature is continuously recycling?
2)Which are the main points to be considered in human impact on the environment?
3)Write five actions to make a contribution to solve global warming
4)Describe in your owm words, the human contribution to the desertification
5)Give three reason to practise the recycling that you can do in your diary life