Answer:
If we do nothing, the world will become significantly less habitable. ... Scientists have studied global warming for more than 100 years. ... The cumulative effect is to raise the planet's temperature. ... Scientists have taken detailed measurements of carbon dioxide (CO2) levels since the late 1950s
Explanation:
LOTIC ECOSYSTEMS, CONSISTING OF RIVERS AND MAINSTREAMS, FREE-FLOWING WATER.
Answer: B.
Explanation:
I believe it is B. because the population hasn't had much of an increase and in the next 50 years I think it will still be the same from now till 50 years.
Answer:
Mercury is the smallest and closet to the sun.
