Energy supply is the largest contributor to global greenhouse gas (GHG )emissions. Emissions from energy supply can be reduced significantly by replacing current world average coal-fired power plants with modern, highly efficient natural gas combined-cycle power plants or combined heat and power plants, provided that natural gas is available and the fugitive emissions associated with its extraction and supply are low or mitigated.
The energy supply sector converts over 75% of total primary energy supply into other forms, namely, electricity, heat, refined oil products, coke, enriched coal, and natural gas. Industry consumes 84% of the final use of coal and peat, 26 % of petroleum products, 47% of natural gas, 40% of electricity, and 43% of heat. Transportation consumes 62% of liquid fuels final use. The building sector is responsible for 46% of final natural gas consumption, 76% of combustible renewables and waste, 52% of electricity use, and 51 % of heat. Forces driving final energy-consumption evolution in all these sectors have a significant impact on the evolution of energy supply systems, both in scale and structure.
Asia has become the major emitter with 41 % share. China’s emissions surpassed the United States, and India’s surpassed Russia’s. Asia accounted for 83 % in 2000 – 2010.
limiting global warming to 1.5°C would require rapid and far-reaching transitions in land, energy, industry, buildings, transport, and cities. Global net human-caused emissions of carbon dioxide would need to fall by about 45 percent from 2010 levels by 2030, reaching ‘net zero’ around 2050. This means that any remaining emissions would need to be balanced by removing CO2 from the air. [Source]