Global warming most threatens the Earth's ability to do what?
Sustain life reproduce Melt polar ice caps growth protect them Resist erosion to move people Produce fossil fuels
A B C D E F G H
Global warming linked to human emissions of heat-trapping gases is changing the planet's climate.
If global warming continues, Earth may no longer be able to sustain life.
Global warming most threatens the Earth's ability to do what? (A) Sustain life (B) reproduce (C) Melt polar ice caps (D) growth (E) protect them (F) Resist erosion (G) to move people (H) Produce fossil fuels