Greenhouse Effect Highest in human history,level of corbondioxide,greenhouse effect highest

Greenhouse Effect Highest  in human history

Green house gas that has very essential role in global warming have reached their highest level in almost 2 million years, it topped 400 parts per million at a key observing station in Hawaii for the first time since measurement began in 1958, the National Oceanic and Atmospheric Administration said on Friday.

The number 400 anticipated by the scientist is notable because it is a round figure an amount never before .Pieter Tans, a senior scientist said"What we see today is 100 percent due to human activity,”. The burning of fossil fuels, such as coal for electricity and oil for gasoline, has caused the overwhelming bulk of the man-made increase in carbon in the air.

It's important mainly as a milestone that marks a steady progress of increasing carbon dioxide in the atmosphere," said James Butler of NOAA's Earth System Research Laboratory.

Dozens of observing stations around the world monitor atmospheric carbon dioxide. But Mauna Loa, a volcanic mountain on the Big Island of Hawaii, is regarded as the benchmark site, NOAA said.

Carbon dioxide  trapsheat green house gas remains in atmosphere for about a century. It is emitted by fossil-fueled vehicles and coal-fired factories and power plants as well as by natural activities such as breathing. Over the last three decades of the 20th century, gross domestic product per capita and population growth were the main drivers of increases in greenhouse gas emissions.CO₂ emissions are continuing to rise due to the burning of fossil fuels and land-use change.Emissions can be attributed to different region.

 The global average temperature rose almost half a degree during the first forty years of this century, was level for the next forty, and rose during the eighties. Yet the greenhouse effect is unknown because other decades-long influences such as changes in solar intensity and in the atmosphere.

During the last 800,000 years, the level of atmospheric carbon dioxide fluctuated between 180 ppm and 280 ppm.Despite compelling scientific evidence, governments and businesses have responded with painful slowness. Even if countries fulfill all current mitigation pledges, the world will still face between 2.6 and 4 ºC of warming.