After negotiating a deal on "Shark Tank," a company that sells fire-starters is now working to save the world's trees. Celebrity investors Mark Cuban and Lori Greiner invested $300,000 for 30 percent of Salt Lake City-based Instafire on an episode that aired in 2016. The company's fire-starters create water-resistant flames that reach up to 16 inches, can withstand winds of up to 30 miles per hour, and stay lit for almost 30 minutes. A patented mixture of volcanic rock, wood pellets and paraffin...
