A.1. Human activities are estimated to have caused approximately 1.0°C of global warming above pre-industrial levels, with a likely range of 0.8°C to 1.2°C. Global warming is likely to reach 1.5°C between 2030 and 2052 if it continues to increase at the current rate. (high confidence) (Figure SPM.1) {1.2}
A.1.1. Reflecting the long-term warming trend since pre-industrial times, observed global mean surface temperature (GMST) for the decade 2006–2015 was 0.87°C (likely between 0.75°C and 0.99°C) higher than the average over the 1850–1900 period (very high confidence). Estimated anthropogenic global warming matches the level of observed warming to within ±20% (likely range). Estimated anthropogenic global warming is currently increasing at 0.2°C (likely between 0.1°C and 0.3°C) per decade due to past and ongoing emissions (high confidence). {1.2.1, Table 1.1, 1.2.4}
A.1.2. Warming greater than the global annual average is being experienced in many land regions and seasons, including two to three times higher in the Arctic. Warming is generally higher over land than over the ocean. (high confidence) {1.2.1, 1.2.2, Figure 1.1, Figure 1.3, 3.3.1, 3.3.2}...
Within the global scientific community there is "high confidence" to the knowledge that human activity caused 1.0 degree C increase to Earth's troposphere. What is there besides that needs to be known?
I am serious.
What does any leader of any government need to know, except, that human activity IS RESPONSIBLE for 1.0 degree C INCREASE to Earth's troposphere. It is the responsibility of humans on Earth to reverse and stabilize this trend.
When looking across the globe there are countries that contribute enormous amounts of greenhouse gas emissions and it is THEIR RESPONSIBILITY to end their emissions. The major emitters of greenhouse gases:
As of 2010, 52.86 percent of the CO2 emissions came from five countries
China - 23.43 percent
USA - 14.69 percent
India - 5.70 percent
Russian Federation - 4.87 percent
Brazil - 4.17 percent
In the year 2018 I can honestly state the USA has tried it's best to bring down the use of fossil fuels, UNTIL, 2005 when Richard Cheney's Energy Policy turned fracking loose on the land in the USA. Since, that unfettered destruction of land in the USA by fracking, Oklahoma now has a very tentative outcome for landowners due to significant and increasing seismic activity.
China is not a first world country, neither is India, Russia or Brazil. The USA allies have done their part and moved to reduce and eliminate the emissions of greenhouse gases, including CO2. I might add, the reduction of other greenhouse gases, including methane, needs to be stopped now. Other then CO2, the dangers of emissions of the other greenhouse gases are far more dangerous to Earth's outcomes.
