Sales & Marketing in Australia

I think you can study environment science as part of distant education. After the completion of your MBA you can do distant education and can learn environmental science.

Go for accounts, human resources, operations management, project management or general management. You can check university's websites for more specializations and decide as per your career interests.

Yes a bit because canada has wider market than australia. moreover working population in canada is lesser than australia. saying this I do not mean that australia is complete no. in case you have relatives in australia, they may recommend and it may work in australia too, just that a lil difficult.