Q. Where does the data come from?
A. The data is loaded from bmreports.com every 5 minutes.
Q. Where does the co2 data come from?
A. Most of the figures come from the EDF energy website. Hydroelectric is quoted at between 10 and 30 g/kWh so a figure of 20 is used. Biomass -there seems to be no consensus of opinion(opinions range from 'zero' to 'worse than coal') so a figure of half that of coal has been used.