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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- The main cause of the increase in the amount of CO2 in Earth’satmosphere over the past 150 years is(A) increased worldwide primary production.(B) increased worldwide standing crop.(C) an increase in the amount of infrared radiation absorbedby the atmosphere.(D) the burning of larger amounts of wood and fossil fuelsarrow_forwardThe 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_forward1.What is the most common source of CO2 emissions? 2.How do ice cores provide CO2 level data that is thousands of years old? 3.lf CO2 levels have changed over the past 400,000 years, what evidence do we have that shows human impacts are changing CO2 levels currently? 4.How are CO2 levels and temperature linked? 5.What is the Keeling curve? 6.Is the Keeling curve controversial? Why or why not? 7.Within the past four years, how have CO2 levels changed?arrow_forward
- We learned an ironic twist in the film called "The Other Inconvenient Truth." It was that a. agriculture creates more pollution than other sources, but we have to increase farming for the growing population b. that nitrogen in the soil is significant pollution, but if we don't use these fertilizers we will not have enough food c. That methane is produced by animals and by growing rice. So becoming vegetarian won't clear methane from the atmosphere. d. agriculture uses 70% of fresh water mined , causing a salt water pollution tooarrow_forwardWhy is carbon dioxide, a life sustaining, compound considered pollution and how do scientists know that humans are responsible for the increasing levels of CO2 in the atmosphere and global warming? When does carbon dioxide become a pollutant? Global warming has caused a rise in the world’s oceans. How is this affecting world coastlines? How is this affecting the coastline closest to you? Can you envision some popular tourist locations that might be endangered by a rising ocean? Are “greening” efforts like using biofuels and low-carbon imprint practices too little, too late? Task: Do some research on increasing levels of carbon dioxide in our biosphere and what consequences that will have. Additionally what are some options suggested to help combat this issue?arrow_forward1) If we put a photosynthetic organism in a closed, sealed environment and shine a light on it, we observe that the CO2 and O2 levels in the container reach constant levels. a) Explain why this would occur. b) What factor/value would you expect to be the primary determinant of this value?arrow_forward
- How can you, as a climate change scientist develop a research proposal to reduce CO2 levels to positively impact climate change?arrow_forward3) dissolved oxygen 4) hydrogen sulfide 5) coliform bacteria 17. An environmental science student observed a sound meter recording of 100 decibels when a train entered the station? What conclusion can be drawn from this observation? 12. Which factor is a major cause of global warming? 1) increased number of green plants 2) decrease in atmospheric CO. 3) increased burning of fuels d) increase in photosynthesis 1) This sound volume meets health standards. 2)This sound level would not be damaging to the ears. 3)This volume of sound constitutes noise pollution. 4)This sound level is not considered an example of noise pollution. 13. The effluent coming from a typical sewage treatment plant is 1) free of all pollutants 2) low in pathogens 3) high in sludge 4) high is fecal wastes Base your answers to questions 18 to 20 on the following chemical reaction CO: + H;0 - H,CO, + HCO, + H* co + 2H 18. This chemical reaction can produce 1) a small number of hydrogen ions 2) a large number of…arrow_forwardWhat has changed in the world that has resulted in the drastic increase of carbon dioxide levels in the atmosphere?arrow_forward
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Nitrogen emissions: environmental and health hazards; Author: Sandec Eawag;https://www.youtube.com/watch?v=iYcchHZ5Ejo;License: Standard Youtube License