Question

if earth has warmed and cold naturally why are scientist also concerned about today's global warming​

Answer 1

Answer:

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Explanation:

Human contributions to greenhouse gases in the atmosphere are warming the earth's surface - a process which is projected to increase evaporation of surface water and accelerate the hydrologic cycle. ... Some evidence suggests global warming is already responsible for more extreme precipitation events.

Answer 2

Answer:

Explanation: well global warming is caused by pollution and its effects to humans are harmful. like in some parts of the world it has caused some dangerous wild fires which have rendered some people homeless and most of the time the fire fighters can not put it out.