Mandatory carbon reporting rules could come into effect from next April
New figures suggest SMEs can save £400m a year through basic emission reduction measures
Merrill Lynch chief says REDD scheme investors face risks equivalent to "emerging markets squared"
Billionaire investor's green credentials take a dent as Berkshire Hathaway Group votes against emission caps for energy firms
Initiative will benchmark effective agricultural emission reduction methods across different farms
Each thousand tonnes of additional greenhouse gas emissions lowers company value by more than $200,000, study says
UK firm best of 300 companies, but many are not reporting or verifying emissions data
Eligible organisations warned they have 60 days to submit reports or face substantial financial penalties