The sixth yearly report on the Low Carbon Economy Index by PwC examined the advancement of both developed and emerging economies in reducing their carbon intensity, or emissions per unit of gross domestic product. According to Jonathan Grant of PwC, there is a growing disparity between what is being accomplished and what needs to be done each year. He noted that governments are becoming more disconnected from reality in addressing the goal of limiting global warming to 2 degrees Celsius, as current commitments are only on track for a 3-degree increase. This falls far short of what governments are discussing. Nearly 200 countries agreed during United Nations climate talks to restrict the increase in global temperatures to under 2 degrees Celsius (3.6 Fahrenheit) above pre-industrial levels to prevent heat waves, floods, storms, and rising sea levels due to climate change. The current temperature rise is approximately 0.85 degrees Celsius. A reduction in carbon intensity of 6.2 percent annually is necessary to reach this target, a significant increase compared to the 1.2 percent rate from 2012 to 2013. Achieving this reduction would require changes on a much larger scale than recent shifts in energy production in some countries. France moved towards nuclear power in the 1980s and saw a 4 percent reduction in emissions, while Britain's focus on gas in the 1990s resulted in a 3 percent cut. The United States experienced a 3.5 percent reduction in emissions due to the shale gas boom in 2012. PwC noted a positive development where emerging economies like China, India, and Mexico reduced their carbon intensity faster than industrialized nations such as the US, Japan, and the EU for the first time in six years. Australia led in decarbonisation for the second consecutive year, decreasing its carbon intensity by 7.2 percent in 2013. Despite having high emissions per person, Australia's efforts to reduce emissions have slowed down since the repeal of a tax on emissions in July. Britain, Italy, and China all successfully reduced their carbon emissions at a rate of 4-5 percent. In contrast, France, the United States, India, Germany, and Brazil saw an increase in their carbon intensity.