A new study indicates that if current emission rates of greenhouse gases continue, leaves will begin to appear an average of 21 days earlier nationally by 2100 compared to recent trends. (climatecentral.org)
A second depicts required improvements in emissions rates for the entire electricity sector. (rff.org)
If the impact of deforestation and other land - use changes is included, the total annual CO2 emission rate is equal to 6 - 8 billion tonnes of carbon. (usask.ca)