This report provides an overview of projected greenhouse gas emissions of seven major emitting countries (Brazil, China, India, Indonesia, Japan, Mexico, and the United States) out to 2030, taking into account the emissions trajectories based on current and selected enhanced policies.

This paper assessed Japan’s fair carbon budget consistent with the 2 °C target between 1990 and 2100 under three frequently referred effort-sharing approaches: Converging Per Capita Emissions (CPE); Common but Differentiated Convergence (CDC); and Greenhouse Development Rights (GDRs), as well as the consequent GHG emission pathways up to 2100 fo

Policy activity has to increase significantly in order to limit global average temperature increase to 2°C above the pre-industrial level. With currently implemented government policies, greenhouse gas emissions are projected to lead to a warming of 3.7?C by the end of this century, about 0.6?C higher than that under the Copenhagen pledges.

Greenhouse gas emissions need to decrease substantially to limit global average temperature to a maximum of 2°C warming above the pre-industrial level in 2100. Emerging economies are of increasing importance in this global effort.

Since the climate negotiations that took place in Copenhagen, in 2009, many countries have submitted quantitative economy-wide greenhouse gas emission reduction targets, proposals, and actions for 2020.