['< sod > the\'\'\'scientific opinion on climate change\'\'\'is the overall judgment among scientists regarding the extent to magnitude which [ [ global warming ] ] is occurring, its causes, and its probable consequences. thus this scientific opinion is expressed in [ [ systematic review | synthesis reports ] ], by scientific bodies of national or international standing, and by surveys of opinion among climate scientists. individual scientists, universities, and laboratories contribute significantly to the overall scientific professional opinion via their [ [ peer review | peer - reviewed ] ] [ [ scientific journal | publications ] ], and the areas of collective agreement and relative certainty are summarised in such these respected reports and surveys. < ref name = " oreskes _ consensus " / > < eod > < http sod > the\'\'\'scientific opinion on climate change\'\'\'is the overall judgment among scientists regarding the extent to which [ [ global warming ] ] is occurring, its causes, and its probable consequences. this scientific opinion is expressed in [ [ systematic review | synthesis reports ] ], by scientific bodies of national or international standing, and by surveys articles of opinion among climate scientists. the individual human scientists, universities, and laboratories contribute to the overall scientific opinion via their [ [ peer review | peer - reviewed ] ] [ [ scientific journal | publications ] ], and the areas of collective agreement and relative certainty are summarised in these respected reports and surveys. < ref name = " oreskes _ consensus " / > this supposed global consensus is based on a 5 % response rate to a two question online - survey. < eod >']