Climate Change 101 with Bill Nye | National Geographic

[Music] we hear it so much that it feels like a buzzword but it is far from it climate change is a real and serious issue but isn't the climate always changing what exactly is climate changing why should we care well the earth's climate has changed throughout history most of these slight changes are caused by small variations in the Earth's orbit but climate change as we know it today is characterized by an Abrupt increase in the Earth's temperature it is estimated to have gotten 1.2 to 1.4 Dees Fahrenheit warmer in just the last Century 10 out

of the last 13 years were the warmest on record 97% of climate scientists agree that this new tendency is not caused by the variations of the Earth's orbit but rather very likely caused by human activities that means you and me and since the Industrial Revolution we have come a long way humans built airplanes faster cars developed remarkable technology and learned how the natural resources around us can be used for our benefit although this has led to many wonderful inventions and advancements like the device you're using to watch this video or the ability to take a

plane halfway around the world it also means we've increased our consumption of natural resources and in turn released a lot of greenhouse gases into the atmosphere now greenhouse gases occur naturally but in excess can be dangerous to our planet modern human activities have increased the release of non-naturally occurring greenhouse gases because we have stepped up our demand for burning fossil fuels the composition of greenhouse gases traps heat radiated from the Sun the more heat they trap the warmer our planet gets and as our planet gets warmer we begin to feel the effects one of climate

change's biggest victims are oceans oceans regulate the earth's temperature and provide 50% of the Earth's oxygen like climate change has increased the global temperature of the oceans by more than. 3° fah since 1969 although a warmer ocean might seem inviting to a beachgoer it actually has devastating consequences for supporting life at Sea one of those consequences is ocean acidification a direct effect of increased dissolve CO2 since the late 18th century ocean surface acidification is increased by 30% a higher acid content means calcifying species like oysters and clams and shallow water corals are at risk putting

the entire ocean food web at risk this is bad news for the 1 billion people relying on the ocean as its primary source of protein climate change has also caused the sea level to rise just in the last century sea levels have risen 6.7 in but the rate in the last decade is nearly doubled sea levels have risen because as the ocean gets warmer it swells on top of that glaciers and ice sheets are melting anarctica lost 36 cubic miles of ice between 2002 and 2005 and since 1994 each year on average the Earth has

lost 400 billion tons from its glaciers that's like an ice cube 7 1/2 km on a side four miles on a side melting and flowing into the sea when all that ice melts it fills up our oceans and just like filling up a bathtub the shores can't hold all that water and coastal regions get flooded troubling signs of climate change are increased extreme weather events natural disasters like floods tornadoes and deadly heat waves are more obvious to humans because of their immediate impact in their sharing of the images in the media climate change as we

know it today is change in our Earth's overall temperature with massive and permanent ramifications although its consequences can be Planet threatening scientists still believe there are things we can do on a personal level to help recycle and reuse things walk or use public transportation to get to work turn off your electronics when you're not using them eat less meat while you're at it eat more locally grown vegetables and foods and last but not least spread your knowledge and concerns about climate change with others when it comes to climate change the main takeaway is that it's

real and although we are part of the cause we can also be part of the solution [Music]