A recent study established with a high degree of accuracy where the humans shouldn't let themselves drive the planet and where are we now. 

 

Getting down to facts and figures, if (or when) the human injection of carbon dioxide in Earth's atmosphere reaches 1 trillion tons, then we should be really beware of the dangerous climate changes that will follow. Researchers said that the primary effect of that amount of carbon in the atmosphere would be the rise of the planet's temperature with 2 degrees Celsius. Although it does not seem much, such a rise of temperature would surely have almost catastrophic consequences.

 

So far, we have injected about 520 billion tons of carbon in the atmosphere. We're half way, but we caught up speed on the way and the second half of the road will take less effort and time. 

 

The number of carbon added into the atmosphere has been growing steadily since 1850 and now is growing at an estimated rate of 9 billion per year. This means that by the half of this century, we might get were we certainly don't want to: a dangerously warmer Earth. 

 

If we want to limit the injection of pollution into the atmosphere and consequently the warming of the planet with more than 2 degrees Celsius or 3.6 degrees Fahrenheit, we must cut the emissions of carbon dioxide by limiting the burning of fossil fuels such as coal, oil and natural gas. This already became the chief goal of the fight against global warming.

 

According to another study on the issue, the world must add less than 1.1 trillion of carbon dioxide in the atmosphere in the first half of this century in order to avoid dangerous temperature rises. We have already added one third of that amount since we have entered this century and at this pace we're most likely to reach that dangerous amount of pollution in just 20 years, according to climate researcher Malte Meinshausen of Germany's Potsdam Institute for Climate Impact Research, The Associate Press reported. 

 

However, this isn't the exactest of sciences and even if we manage to miraculously keep pollution under the aforementioned levels, the globe may still get dangerously warm.