Most of these courses usually require you to have some training in a science and/or with some maths component. Or another degree with an appropriate amount of maths of the right type (e.g. engineering, B.A. in physical geography...remote sensing/GIS courses, climatology/meteorology, BEd with science/maths concentration). However, if you can prove that you can handle the requirements and you have a degree, you might get in. No harm in trying
If you wanted to do a certificate course and then work your way in by doing that, I would imagine you could progress further along.