If I were to go back in time with the knowledge that I have today about Electromagnetic Hypersensitivity (EHS), I would invest the money into changing the electrical characteristics of my body and exhaust that route first, particularly if no one else in the home is showing the condition. If everyone is sick in the home, it is probably an environmental issue that warrants expense on changing the environmental factors.
The only problem that ever really seems to bother empire builders is bureaucracy. Before a new colony on the frontier could be founded, the Senate and Triumvirate would have to pass the plan. Factors influencing the High Lords decision would include, among others, the number of people needed to found the colony and whether this would result in any significant population shift. Another, more critical factor would be whether Tactical Defense could spare the ships or the manpower to patrol the area.
Trees are affected by many factors. Global warming is changing rainfall, humidity, air composition, solar radiation, heating and cooling. Plants are sensitive to any of these factors. When all of the factors start to change at once, it may lead to devastation in the plant world.
Incorrect radiation levels may be able to affect your sex drive and it may be proven in the future that human sex drive is governed more by radiation types and levels than any other factor, even more so than hormones! Generally, a feeling of contentment replaces sexual desire in natural radiation environments.