As the business world becomes increasingly conscious of environmental issues, it is a great time to be an expert in the field, a fact backed up by Porter Scientific’s 30 percent revenue growth in the past year (and estimated 2007 revenues of $3.1 million). Not...

When Andra Rush launched Rush Trucking Corporation in Detroit in 1984, the budding entrepreneur was more than happy to roll up her sleeves and get some grease on her shirt to keep business pumping. She helped her fledgling team with everything from oil changes to mechanics. On days when the company had more runs than drivers, she’d hop into a truck and make deliveries herself.