THE SCIENTIFIC CONSENSUS REGARDING HUMAN-INDUCED CLIMATE CHANGE

Here is a graph posted by informationisbeautiful.net:

Here is a breakdown of the skeptics by their field:

The article further states:

In fact, when you adjust the PetitionProject’s odd categorisation – they filed ‘chemical engineers’ as chemists and physical engineers as ‘physicists’ – the total number of engineers who signed the petition, by our reckoning, jumps to 49%

Why so many engineers?

I think it's because engineers tend to work for the industries that are being challenged to change their practices to lessen their impact on climate change.  Their stance is based on politics, not science.