Heart beats increase for no reason or skips beats sometimes because of anxiety or stress. When the body is put under too much stress, it needs to act out and normally it is through your heart palpitations.
Your answer is: Stress and anxiety
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Answer:global warming, acid rain, air pollution, urban sprawl, waste disposal, ozone layer depletion, water pollution, climate change and many more
They affect every human, animal and nation on this planet.