Q: Burning smell from under the hood and I don't know what it is.

The smell of something burning could be many different problems from something stuck to the exhaust like a plastic bag to oil or coolant leaks on the engine. The smell comes into the passenger compartment through the air intake vents and cannot be avoided. My recommendation would be to have a qualified technician do a thorough check of the engine and exhaust to isolate the burning smell and then diagnose the problem for you.