Indo-Asian News Service: With the problems of climate change gaining urgency, tackling it has become a bigger business than software and biotechnology combined, a research report says. Global annual revenues from climate change businesses – which include renewable energy, nuclear power and energy management – have now surpassed $300 bn, HSBC’s global banking and markets research team has found. HSBC said that 390 companies around the world could now be classed as providing goods or services that tackle …