7. Forests also introduce oxygen in the environment which is produced during photosynthesis. In this process the trees clean the air by absorbing carbon dioxide. Carbon dioxide is the raw material used during photosynthesis.
Kwa mujibu wa utafiti uliochapishwa katika mtandao wa Sing, 51% ya watumiaji wa Android walikubali kuwa tayari kuhama kama watapewa bure simu ya iPhone, 60% ya watumiaji wa iPhone waligoma kuhama hata kama watapewa simu yenye mfumo endeshi wa Android bure.