Reuters: Trade in the world greenhouse gas credits market rose 80 percent last year as emissions rules became a concern for more companies, a carbon analysis group said on Friday. Global carbon credit trade rose to US$60 billion in 2007, from US$33 billion the previous year, according Point Carbon, an Oslo-based group of greenhouse gas analysts and consultants. Total traded volume in the global market reached 2.7 billion tonnes of greenhouse emissions reductions in 2007, a 64 percent …