Describe how deforestation affects the concentration of CO2 in the earth's atmosphere
The removal of CO2 from the atmosphere takes place during photosynthesis, as plants consume CO2 to produce green matter. Deforestation increases CO2 in the atmosphere as timber is cut. If forests are burned or left to rot, it then releases CO2 directly into the air, perhaps accounting for about 10 percent of the observed increase.
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Tropical forests account for 25% of the earth's forested areas.
Answer the following statement true (T) or false (F)
Which of the following is true of United States agriculture in the twenty-first century?
A) It has been losing over a million hectares annually B) It is getting cheaper to buy a farm C) Productivity on farms is going down D) Agricultural subsidies have been eliminated E) Most farmers are below the age of 30
What causes earthquakes? What will be an ideal response?
An assemblage of minerals bound together is called a
A) rock. B) granitic compound. C) mineral. D) molecule.