What is global warming?


Human activities such as burning coal and oil inject additional CO2 into the atmosphere, which acts as an extra blanket to trap solar radiation, worsening the greenhouse effect Soon, the world will gather in Paris to forge a global pact to reduce greenhouse gas emissions blamed for dangerous levels of global warming. Pollution sources Humanity’s annual output of greenhouse gases is higher than ever, totalling the equivalent of just under 53 billion tonnes of CO2 in 2014, according to the UN. It jumped 2.2 percent per year during the 2000s, compared to 1.3 percent per year from 1970-2000. Warmer planet Earth’s average temperature has already climbed about 1.0 C from 1880 to 2015—halfway to the 2 C target. To stay under the 2 C ceiling, greenhouse gas emissions must be cut by 40-70 percent over 2010 levels by 2050, and eliminated entirely by century’s end.

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