Question

if we have two sun on solar system so how we years can we live

Answer 1

our life doesn't depend on sun
it depends upon us how we live..

Answer 2

if there will be two sun in solar system then there are many possibilities of the location of sun's,,if both the sun are near each other I mean in one direction from our earth then it's maximum possibility that there will be decreaseness in night time and day time increase,,and temperature also high,, but if the sun's position is opposite to each other from our earth then there will nigh only few minutes,,it means night time near negligible,,so all time day and llight..then there will be no winter season,,all glacier will become enough water to sink our earth,,,due to both sun temperature higher and higher will be the amount of air,,gases to blow over the sky,,I mean there will decrease in amount of air near earth surface,and we have face problems in breathing,,,our earth ozone layer will damage at a large extent due to which uv rad. will harm our skin,eyes and will increase cancer,,so our chances to live onlyabout 1or2