A theory in science is what lay people call facts. Evolution has been confirmed in every branch of science through measurable experiments (such as DNA analysis) and historical data (fossils). The same applies to the Big Bang Theory, which is mostly rooted in physics.
Man-Made global warming is not a theory, although it has been thoroughly peer-reviewed by hundreds of agencies. The disagreement with global warming is mostly within the realm of politics and the public. There is little disagreement in the scientific community.