Why is the sky blue?

Jacinda Ardern: Covid19 was an unprecedented crisis. There was no playbook for it. But my Government met the challenge and we listened to experts such as the directorgeneral of health Dr Ashley Bloomfield. And if he were here right now then he would tell us that to understand why the sky is blue, we need to consider the nature of sunlight and how it interacts with the gas molecules that make up our atmosphere — but I’m sure he’d put it better than that, and with that gentle smile we all came