Biology: How Life Works
3rd Edition
ISBN: 9781319017637
Author: James Morris, Daniel Hartl, Andrew Knoll, Melissa Michael, Robert Lue, Andrew Berry, Andrew Biewener, Brian Farrell, N. Michele Holbrook
Publisher: Macmillan Higher Education
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Chapter 48.2, Problem 3SAQ
Summary Introduction
According to the Keeling curve, the levels of CO2 have increased dramatically over the past 60 years. Apart from natural CO2 emission like volcanos, human is the major contributors to increase CO2 dramatically by burning fossil fuels, deforestation, industrial revolutions.
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Do you believe global temperatures would start to fall quickly if humanity stopped generating CO2 next year? Why do you think that is?
Why is it important the concentration of CO2 in the atmosphere?
What will happen, if there was no CO2 in the earth's atmosphere?
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- What has changed in the world that has resulted in the drastic increase of carbon dioxide levels in the atmosphere?arrow_forwardOver the past decades, the CO2 concentration in the atmosphere has increased. a. Predict the effect of increasing carbon dioxide concentrations on photorespiration. b. Scientists suggest that increasing CO2 concentrations are leading to higher average global temperatures. If temperatures are increasing, does this change your answer to part (a)?arrow_forwardHow can you, as a climate change scientist develop a research proposal to reduce CO2 levels to positively impact climate change?arrow_forward
- At a time before life existed on Earth, our planet's atmosphere contained extremely little or no Question 2 options: a) nitrogen gases b) water vapor c) carbon dioxide d) gaseous oxygen e) noxious gasesarrow_forwardThe recent increase in atmospheric CO2 concentration is mainly a result of an increase in a. plant growth. b. the absorption of heat radiating from Earth. c. the burning of fossil fuels and wood. d. cellular respiration by the increasing human population.arrow_forwardWhich of the following statements is true? Plants need only CO2 to survive Plants do not need oxygen at all. Plants need both O2 and CO2 to survive Plants neither need O2 and CO2 to survivearrow_forward
- The current concentration of CO2 in the atmosphere is about 415 ppmv. It has been estimated that annual anthropogenic additions to the atmosphere are about 30 gigatonnes (Gt), of which about 15 Gt are removed into oceans and the terrestrial environment. a) Use these values to estimate the yearly net increase in atmospheric carbon dioxide mixing ratio, in ppmv. (note that 1 Gt = 1015g)arrow_forwardAir pollution makes breathing difficult in animals and humans. If you are a scientist, which animal will you choose as an indicator of pollution level in a particular area? Explain the justification of your choice.arrow_forwardSome water, a small amount of soil, a few green aquatic plants and a fish were placed in a large bottle. The bottle was placed in a window to receive light during the daytime. Explain what will happen to the CO2 and oxygen levels in the bottle over time. Be sure to include the processes that affect these levelsarrow_forward
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