Which one is correct? And why?<br/><br/>1. If we are to end world poverty, the richer countries will need to make sacrifices.<br/><br/>2. If we end world poverty, the richer countries will need to make sacrifices.<br/><br/>And<br/><br/>1. If we were to end world poverty, the richer countries would need to make sacrifices.<br/><br/>2. If we ended world poverty, the richer countries would need to make sacrifices.