John from wikipedia

A study of 4000 abstracts of peer-reviewed papers published in the past 21 years that state a position on global has revealed an astonishing consensus; 97% of these endorsed the position that we are seeing anthropogenic global warming (AGW)[1].

Warning Science is not a democracy in the sense that if most scientists agree, then it must be correct.

Also note;

• 66.4% of abstracts expressed no position on AGW.
• 32.6% endorsed AGW.
• 0.7% rejected AGW.
• 0.3% were uncertain about the cause of global warming.

Link
Study reveals scientific consensus on anthropogenic climate change, IOP News

Reference
[1]John Cook et al (2013), Quantifying the consensus on anthropogenic global warming in the scientific literature, Environ. Res. Lett. 8 024024