This is answerable:
The majority of the scientific community is in agreement that this is currently not possible to terraform Mars with current technology.
- if it were remotely possible, wouldn't there be a mad international dash to try.
Martian atmosphere is generally colder than the arctic. It does have daily highs of 70 deg F however it's nights are as low as -100. Many plants don't do well when the water inside them freeze. https://www.space.com/16907-what-is-the-temperature-of-mars.html
Martian atmosphere is thinner than Earth's. Terrestrial life is adapted to require certain minimum pressures in order to carry out gas exchange. Raising the atmospheric pressure of Mars is currently a large head scratcher. There are theories, but nothing a single nation will likely invest in, in anyone's life time.
Mars is dry, most of the water is stored in the incredibly frigid poles. Very hard to grow plants with those restrictions.
The Martian magnetosphere is incredibly weak. The magnetosphere is what protects a planet's gaseous atmosphere from getting blasted away by solar winds as well as grants some protection from certain forms of radiation. Currently, the only known way to fix a magnetosphere is to reheat a planet's metal core....
Pretty sure the scientific community (in majority) does not view the terraforming of Mars with any kind of possibility with today's level of technology.
Does the scientific community believe that Mars is colonizable? Now that is a different question very much in its infancy. Lots of experiments are currently being conducted. McMurdo station in Antarctica for one is virtually a long running experiment in logistics in keeping a large human population alive in inhospitably cold conditions.
On this perspective, IF we choose to colonize Mars anytime soon, any settlements will be some kind of enclosed structure. Though there are still very very many questions that need be experimented before this is possible. Note: this is not to say colonization is immediately possible either....