More teens are learning empathy through social media, and feel the adults in their lives are falling short.  According to a new Harris Interactive poll for World Vision, 56-percent of the 13-to-17-year-olds have become more aware of the needs of others through outlets like Facebook and Twitter, which is up 12-percent since 2011.  Meanwhile, 68-percent say they aren't seeing many adults serving as good role models and teaching by example in assisting those in need.  Many teenagers are also feeling a sense of social responsibility.  Three-quarters of the respondents believe that religious institutions should take the lead in fighting hunger in their communities, but 66-percent also feel they should be taking action to help out those less fortunate.