SALEM – Environmentally-aware Salem State College students Monday collected a special Valentine’s Day gift to U.S. Rep. John F. Tierney in thanks for his stance against global warming.The students, many of the members of the college’s Massachusetts Public Interest Research Group (MAS-SPIRG) chapter, gathered 206 homemade holiday cards, each signed by students who acknowledge that the congressman is “too cool for global warming.” The cards will be fashioned into a single heart-shaped valentine and delivered to the congressman’s Peabody office next week.According to MASSPIRG spokeswoman Cindy Sous, the cards note Tierney for supporting investments in global warming solutions in the House economic recovery package.The students are now asking Tierney to make sure the final version of the American Recovery and Reinvestment Act contains strong provisions for supporting solutions that will cut global warming pollution and create thousands of jobs, including investing in public transportation, renewable energy development and energy efficiency projects, Sous said.