5 Human Impacts on the Environment: Crash Course Ecology #10

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Hank gives the run down on the top five ways humans are negatively impacting the environment and having detrimental effects on the valuable ecosystem services which a healthy biosphere provides.

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Table of Contents
Ecosystem Services 00:51
The Importance of Biodiversity 04:07
Deforestation 06:42
Desertification 06:49
Global Warming 07:59
Invasive Species 08:51
Overharvesting 09:20

Crash Course/SciShow videos referenced in this episode:
Hydrologic and Carbon Cycles: http://www.youtube.com/watch?v=2D7hZpIYlCA
Nitrogen and Phosphorus Cycles: http://www.youtube.com/watch?v=leHy-Y_8nRs
Ecological Succession: http://www.youtube.com/watch?v=jZKIHe2LDP8
Climate Change: http://www.youtube.com/watch?v=M2Jxs7lR8ZI
Invasive Species: http://www.youtube.com/watch?v=eDOwTXobJ3k
Food Shortage: http://www.youtube.com/watch?v=bPLJP84xL9A

References and image licenses for this episode can be found in the Google document here: http://dft.ba/-3n5P Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse


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  1. Imagine watching this again and realize that the Amazonian Forest is almost gone due to extreme wildfire. And imagine how many biodiversities were eradicated due to that phenomenon.

  2. And in August 2019 this video becomes incredibly sad that 6 years on we watch the Amazon being burned due to agriculture and our obsession with consuming meat/animals. We never learn and therefore deserve the extinction we are bringing on.

  3. I completely understand that humans are destroying ecosystems all around the world. But didnt you say in earlier videos that destruction brings about beautiful ecosystems in the long run??? ?

  4. People are always responsible for the destruction of nature. And the destruction of nature means that life on earth will no longer exist. People are dependent on nature, Nature is not dependent on human.. people have forgotten it now. As a result not only humans but every living creatures on Earth is suffering the deeds of human being today. The Earth has become increasingly fragile For some types of people and political leaders and politician. One of the main cause of this situation in the World today is human being.. At present, Human being will be one of the leading cause of destruction of the Earth…….
    If all the people on Earth were not United to save the Earth and Nature now, it would be too late………
    Love you man. Ur video is really good always..

  5. Do people not realize that all these “great white inventions” made by white people are all the reasons the environment is suffering right now? From slavery, to plastics damaging the environment, to the invention of an oil powered car, airplane, all killing the air. What good has white people ever done to this earth? Honestly? No offense.

  6. I think the world just isn't fixable right now.
    we are slowly changing, but to many people will not change, not only because they are lazy, but because they need to.
    for example: millions of people are employed in refineries, garbage dumps, etc. who cannot afford to stop using these facilities because it is their job. in China the communist government is causing thousands of problems by dumping North Americas "recycling" in the ocean, and the leaders of these North American countries know this well.
    every time we cut down a tree, we must replant it. Large companies don't do this because it is expensive. Because these companies do not replant these trees using large amounts of money, They are successful. Carbon Taxes will not help because our governments (The same ones that lie to us about recycling) don't use this money for the causes that they should be using them for, and even if they did, the companies that they were trying to change would just move and wreck our environment somewhere else. Even if the world can't be completely fixed, we must try. Not only animals and plants, but people are dying because of this issue. Let's "be the change you want to see in the world" (-Gandi)

  7. What were the 5 ways that humans impact the environment? Was is 1. Deforestation, 2. Desertification, 3. Climate change, 4. Global warming, and 5. Pollution? Please correct me if I'm wrong!

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