Bees help plants and flowers bloom, which in turn lets the plants make oxygen. If bees stopped collecting nectar then the plants and flowers would die off and the plants would have more trouble turning carbon dioxide into oxygen. If plants slowed the process of turning carbon dioxide into oxygen then there wouldn't be as much oxygen and people would have trouble doing normally
Bees help plants and flowers bloom, which in turn lets the plants make oxygen. If bees stopped collecting nectar then the plants and flowers would die off and the plants would have more trouble turning carbon dioxide into oxygen. If plants slowed the process of turning carbon dioxide into oxygen then there wouldn't be as much oxygen and people would have trouble doing normally