Star Scientific is a 25-year-old research laboratory north of Sydney, Australia. The company is one of many trying to make existing power plants carbon-free. This includes old coal-fired thermal power stations which remain among the biggest contributors to greenhouse gas emissions on the planet. Star has invented a patented non-polluting catalyst which it calls HERO® which is an acronym for Hydrogen Energy Release Optimizer. It uses hydrogen without producing combustion. That makes converting power plants from coal or natural gas without having to change the steam turbine infrastructure much simpler.