What is the natural greenhouse effect? How has it been changed by human activities been changed by human activities?
What will be an ideal response?
The natural effect has been affected because human activities have added additional greenhouse gases, such as carbon dioxide, ozone, and methane, to the Earth's atmosphere. These additional GHGs have, in part, come from increased consumption of oil and petroleum products, the clearing and burning of forests, and the growth of cattle and sheep ranching.
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What is created when an atom loses or gains an electron?
A. ion B. compound C. molecule D. element
Which of the following terms refers to a second surge of electrons that proceeds from the base of a cloud toward the ground during cloud-to-ground lightning?
A. stepped leader B. dart leader C. return stroke D. downstroke
Deltas prograde, or grow, when sea level regresses
a. True b. False
Ecosystems are connected by ________
A) individual species competing for space with other species in the ecosystem B) energy cycling and nutrient flow C) the essential flow of water through the ecosystem D) the movement of pollutants between ecosystems E) the flow of energy and matter through the ecosystem