Mia looked at a graph showing average global temperatures. she noticed that the
average temperatures have risen abruptly over the past several decades. this
indicates that global warming is occurring at a fast rate. what additional pieces of
evidence do scientists use to support the idea that global warming is happening?
a. the greenhouse effect and reductions in sea levels
b. ocean temperature changes, greenhouse gases concentrations, and harmful
emissions reductions
c. greenhouse gas concentrations, decreases in amounts of sea ice, and increases
in sea levels
d. the amount of greenhouse gases leaving the atmosphere and increases in
amounts of sea ice

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