Scientists measured a drop in the average global temperature of about 1 degree F (0.6 degrees C).
Tiny organisms known as cyanobacteria, or blue-green algae.
Plants can grow from sunlight and water.
<span>It becomes an </span>ion<span>. An atom that gains a negative electron, it becomes a negative </span>ion<span>. If it loses an electron it becomes a positive </span>ion<span>.</span>
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