Water covers about 70% of Earth's surface. Why is this resource precious and one that needs to be conserved? O A. The world's freshwater to be trapped in the atmosphere due to the greenhouse effect
o
B. Most of Earth's freshwater is unavailable for drinking and irrigation
a
C. The polar ice caps are trapping more freshwater each year
D. The Earth's oceans are evaporating due to global warming caused by greenhouse gas emissions