cce19_tutorial_1_solutions.pdf - TUTORIAL 1 SOLUTIONS CLIMATE CHANGE SCIENCE AND EMPIRICS 1 What is the evidence to suggest that humans are responsible

cce19_tutorial_1_solutions.pdf - TUTORIAL 1 SOLUTIONS...

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TUTORIAL 1 SOLUTIONS: CLIMATE CHANGE SCIENCE AND EMPIRICS ECO3CCE Page 1 1. What is the evidence to suggest that humans are responsible for climate change? (Respond in one short paragraph less than 150 words) Since the industrial revolution global carbon dioxide atmospheric concentrations have increased from around 280 ppm to over 400 ppm as result of burning of fossil fuels, cement production and deforestation and land clearing. This has created an imbalance in that GHG’s are being added to the atmosphere faster than removed (in the biosphere and oceans). This increase in atmospheric CO 2 acts like adding a blanket and warming the earth. The IPCC in the AR5 state, “The human influence on the climate system is cle ar. This is evident from the increasing greenhouse gas concentrations in the atmosphere, positive radiative forcing, observed warming, and understanding of the climate system” (2013, .p.15) Powell (2016) conducts five surveys of the peer-reviewed literature from 1991 to 2015, and
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