To some, global warming is still a myth - something that has been concocted to scare people into reducing their emissions. However for scientists, global warming is true, and warns that if carbon dioxide emissions are not reduced or stopped, global warming's 2 degree-Celsius increase will be inevitable.

According to a study done by an international team of scientists, that was led by the University of Exeter, limiting the effects of global warming to safe levels require reducing CO2 emissions within the next two decades, which will eventually lead to zero emissions.

In the study, the scientists tackled how steep a reduction is needed and how soon should it begin, as well as how quickly emissions need to drop in the next few decades.

Their findings suggest that reducing emissions to zero, or even to negative emissions, is possible but should start now and should cut global emissions by at least 3% yearly within the next two decades to avoid the effects of global warming.

The scientists also looked at a worst-case scenario of high climate sensitivity. In this scenario, the experts suggested using carbon capture and storage technology, which stores carbon dioxide deep into the earth, combined with aggressive mitigation rates in the coming decades.

Also looking into a best-case scenario, the scientists said that low climate sensitivity permits longer delays and lower mitigation rates, but still need to cut emissions by 90%.

Lead author professor Pierre Friedlingstein of the University of Exeter said that the findings surprised him since it showed that the world only has a few options available, and what's more, the urgency of the situation.

According to LiveScience.com, a 2 degree-Celsius increase would mean sea ice retreating, thus less light is reflected which would lead to less cooling. The increase in temperature, while not affecting the day-to-day weather, will affect extreme events, such as typhoons, to be more extreme.

For Australia, global warming will affect the region's environment, economy, and communities, reported Wikipedia. Extreme weather events such as intensified wind speeds of tropical cyclones, increase in the rainfall of tropical cyclones, stronger tides along eastern Victoria's coast, and increased rate of forest fires.