If it's true that a butterfly flapping it's wings in one part of the world can cause a hurricane in a distant part of the world then what effect can millions of people have on the weather?
And if millions of people can effect the weather, does the weather forecast itself change what the weather will be since it can probably change what millions of people choose to do?
And if millions of people can effect the weather, does the weather forecast itself change what the weather will be since it can probably change what millions of people choose to do?