What is the best way to get rid of unwanted small trees?

Soak it at the base of the trunk mostly and a bit around the root base. Do it at night when its cool so the water will soak in with minimal evaporation.

Upwards.

Antibiotics and a greater sense of self preservation.

First, make sure you're adequately hydrated and drink at least 6-8 glasses of fluids daily. You could try Robitussin on a temporary basis. Mucus plugs in bronchitis will require additional...

Take deep breaths and think about pretty things.