Climate Change 101 with Bill Nye | National Geographic

00:04:10
https://www.youtube.com/watch?v=EtW2rrLHs08

摘要

TLDRThe video discusses the serious issue of climate change, its causes, and effects. Historically, Earth's climate has changed due to natural variations. However, recent rapid temperature increases are attributed to human activities like burning fossil fuels, leading to excessive greenhouse gas emissions. These gases trap heat, causing global warming and significant environmental impacts such as ocean acidification, rising sea levels, and extreme weather events. Oceans, crucial for regulating Earth's climate, are becoming warmer and more acidic, threatening marine life and food sources for billions. Melting glaciers further contribute to sea level rise. Despite the grave threat, individuals can take actionable steps such as recycling, using public transportation, reducing energy consumption, eating less meat, and educating others about climate change. The video emphasizes that while humans contribute to climate change, they can also contribute to solutions.

心得

  • 🌍 Climate change is a pressing global issue caused mainly by human activities.
  • 🔥 The Earth has warmed by approximately 1.2 to 1.4 degrees Fahrenheit in the last century.
  • 🌊 Oceans, key in climate regulation, are warming and acidifying, affecting marine life.
  • 🏔️ Melting glaciers contribute to rising sea levels, causing coastal flooding.
  • 🌪️ Climate change increases extreme weather events like floods and heatwaves.
  • 📝 Individuals can help by recycling, reducing consumption, and raising awareness.
  • 💡 97% of climate scientists agree that climate change is primarily human-induced.
  • 🚶‍♂️ Using public transport and conserving energy helps combat climate change.
  • 🥦 Eating less meat and more local produce can reduce one's carbon footprint.
  • 🌱 Sharing information and concerns about climate change encourages collective action.

时间轴

  • 00:00:00 - 00:04:10

    Climate change, often perceived as a buzzword, is a serious issue characterized by a significant rise in Earth's temperature, primarily due to human activities since the Industrial Revolution, not natural causes like Earth's orbit changes. Greenhouse gas emissions from fossil fuels trap heat, contributing to warming. This change affects oceans by raising temperatures and causing ocean acidification, threatening marine life and those relying on it for food. Additionally, it results in rising sea levels due to melting ice and extreme weather events. People can mitigate impacts by adopting sustainable practices like recycling, reducing fossil fuel use, and spreading awareness.

思维导图

Mind Map

常见问题

  • What is climate change?

    Climate change refers to the significant and lasting changes in the Earth's climate, especially the rapid increase in Earth's temperature primarily due to human activities.

  • Why is climate change happening?

    Current climate change is primarily caused by human activities, such as burning fossil fuels, which increase greenhouse gases in the atmosphere.

  • How much has the Earth's temperature increased recently?

    The Earth's temperature has increased by 1.2 to 1.4 degrees Fahrenheit in the last century.

  • What are some effects of climate change on oceans?

    Climate change leads to ocean acidification and higher global ocean temperatures, threatening marine life and ecosystems.

  • How has sea level been affected by climate change?

    Sea levels have risen by 6.7 inches in the last century, with the rate nearly doubling in the past decade due to melting ice and ocean expansion.

  • What are some examples of extreme weather caused by climate change?

    Climate change has increased the frequency and intensity of extreme weather events like floods, tornadoes, and heat waves.

  • Can individuals do anything to combat climate change?

    Yes, individuals can help by recycling, using public transportation, conserving energy, eating less meat, and spreading awareness about climate change.

  • Why is ocean acidification a concern?

    Ocean acidification threatens calcifying species like oysters and corals, disrupting entire marine food webs and impacting people who rely on seafood.

  • How does climate change impact glaciers?

    Climate change causes glaciers to melt, contributing to rising sea levels and loss of freshwater resources.

  • What percentage of climate scientists agree on human-caused climate change?

    97% of climate scientists agree that current climate change is very likely caused by human activities.

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    [Music]
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    we hear it so much that it feels like a
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    buzzword but it is far from it climate
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    change is a real and serious issue but
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    isn't the climate always changing what
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    exactly is climate changing why should
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    we care well the earth's climate has
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    changed throughout history most of these
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    slight changes are caused by small
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    variations in the Earth's orbit but
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    climate change as we know it today is
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    characterized by an Abrupt increase in
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    the Earth's temperature it is estimated
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    to have gotten 1.2 to 1.4 Dees
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    Fahrenheit warmer in just the last
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    Century 10 out of the last 13 years were
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    the warmest on record 97% of climate
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    scientists agree that this new tendency
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    is not caused by the variations of the
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    Earth's orbit but rather very likely
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    caused by human activities that means
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    you and me and since the Industrial
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    Revolution we have come a long way
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    humans built airplanes faster cars
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    developed remarkable technology and
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    learned how the natural resources around
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    us can be used for our benefit although
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    this has led to many wonderful
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    inventions and advancements like the
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    device you're using to watch this video
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    or the ability to take a plane halfway
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    around the world it also means we've
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    increased our consumption of natural
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    resources and in turn released a lot of
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    greenhouse gases into the atmosphere now
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    greenhouse gases occur naturally but in
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    excess can be dangerous to our planet
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    modern human activities have increased
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    the release of non-naturally occurring
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    greenhouse gases because we have stepped
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    up our demand for burning fossil fuels
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    the composition of greenhouse gases
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    traps heat radiated from the Sun the
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    more heat they trap the warmer our
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    planet gets and as our planet gets
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    warmer we begin to feel the effects one
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    of climate change's biggest victims are
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    oceans oceans regulate the earth's
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    temperature and provide 50% of the
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    Earth's oxygen like climate change has
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    increased the global temperature of the
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    oceans by more than. 3° fah since
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    1969 although a warmer ocean might seem
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    inviting to a beachgoer it actually has
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    devastating consequences for supporting
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    life at Sea one of those consequences is
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    ocean acidification a direct effect of
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    increased dissolve CO2 since the late
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    18th century ocean surface acidification
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    is increased by 30% a higher acid
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    content means calcifying species like
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    oysters and clams and shallow water
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    corals are at risk putting the entire
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    ocean food web at risk this is bad news
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    for the 1 billion people relying on the
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    ocean as its primary source of protein
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    climate change has also caused the sea
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    level to rise just in the last century
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    sea levels have risen 6.7 in but the
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    rate in the last decade is nearly
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    doubled sea levels have risen because as
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    the ocean gets warmer it swells on top
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    of that glaciers and ice sheets are
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    melting anarctica lost 36 cubic miles of
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    ice between 2002 and 2005 and since 1994
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    each year on average the Earth has lost
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    400 billion tons from its glaciers
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    that's like an ice cube 7 1/2 km on a
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    side four miles on a side melting and
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    flowing into the sea when all that ice
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    melts it fills up our oceans and just
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    like filling up a bathtub the shores
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    can't hold all that water and coastal
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    regions get flooded troubling signs of
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    climate change are increased extreme
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    weather events natural disasters like
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    floods tornadoes and deadly heat waves
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    are more obvious to humans because of
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    their immediate impact in their sharing
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    of the images in the media climate
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    change as we know it today is change in
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    our Earth's overall temperature with
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    massive and permanent ramifications
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    although its consequences can be Planet
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    threatening scientists still believe
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    there are things we can do on a personal
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    level to help recycle and reuse things
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    walk or use public transportation to get
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    to work turn off your electronics when
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    you're not using them eat less meat
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    while you're at it eat more locally
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    grown vegetables and foods and last but
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    not least spread your knowledge and
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    concerns about climate change with
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    others when it comes to climate change
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    the main takeaway is that it's real and
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    although we are part of the cause we can
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    also be part of the solution
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    [Music]
标签
  • climate change
  • greenhouse gases
  • global warming
  • ocean acidification
  • sea level rise
  • glaciers
  • extreme weather
  • human activities
  • environmental impact