Fahimtar bambancin sararin samaniya da tsarin samar da bambance-bambancen halittu abu ne mai zafi a cikin nazarin muhalli. Idan aka kwatanta da bambancin α, bambancin β ya fi dacewa wajen nuna yanayin al'umma. A cikin shekarun da suka gabata, nazarin bambancin β yawanci yana mai da hankali kan tsirrai, dabbobi masu shayarwa, da tsuntsaye.