John Lennon and Paul McCartney sang on most of the Beatles' songs.

together

Explanation:

they believed that it sounded better   with the both of them as the lead singer

explanation:

human affect the biosphere by inceasing air pollution , damaging the ozone layer, worsening global warming , producing non - biodegradable waste, and causing deforestation . the combined effect of human activity results in the destruction of ecosystems

plz mark as brainliest

if

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explanation: