Human Activity And Climate Change - amazonia.fiocruz.br

Human Activity And Climate Change Video

What is causing climate change? Human Activity And Climate Change

Human Activity And Climate Change - the

Carbon dioxide CO 2 is an important heat-trapping greenhouse gas, which is released through human activities such as deforestation and burning fossil fuels, as well as natural processes such as respiration and volcanic eruptions. The first graph shows atmospheric CO 2 levels measured at Mauna Loa Observatory, Hawaii, in recent years, with average seasonal cycle removed. The second graph shows CO 2 levels during the last three glacial cycles, as reconstructed from ice cores. This is more than what had happened naturally over a 20, year period from the Last Glacial Maximum to , from ppm to ppm. The time series below shows global distribution and variation of the concentration of mid-tropospheric carbon dioxide in parts per million ppm. The overall color of the map shifts toward the red with advancing time due to the annual increase of CO 2.

Tens of thousands of scientists in more than a hundred nations have amassed an overwhelming amount of evidence pointing to a clear conclusion: Humans are the main cause.

We're the ones who burn fossil fuels, produce livestock and clear trees, increasing the amount of heat-trapping gases in the atmosphere. No one questions the link between smoking and cancer, Humaj the science was settled in the s after more than 50 years of research. We can think of the state of human activities and climate change as no different than smoking and cancer.

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In fact, we are as confident that humans cause climate change as we are that smoking causes cancer. Every day more than 60 people sign up for news and alerts, to find out when their support helps most.

Will you join them? Read our privacy policy. Most Americans recognize climate change, but some are still unsure about its causes.

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It's like the smoking-cancer link No one questions the link between smoking and cancer, because the science was settled in the s after more than 50 years of research. Scientists have no doubt that humans are causing global warming. Ilissa Ocko, Climate Scientist. Act when it matters most Every day more than 60 people sign up for news and alerts, to find out when their support helps most.]