The seasons or sun i believe... not 100% someone else improve:
Temperature
transcription factor proteins.
Human Population Growth
The main factor influencing production is consumer demand.
The primary factor influencing the rate of infection is age; children between the ages of six months and four years are most vulnerable to H. influenzae.
The rising cost in
Muscle and Fat
Sexual activity is the most important factor influencing the acquisition of HPV 16 and 18. A higher number of partners and early sexual activity are most predictive.
the conditions of the nation's economy
Prenatal care
VISCOSITY generally decreases with increase in temperature.(a factor responsible for cleaning action of soap) .There might be exceptions.
The vacuum gap and voltage are two various factors influencing breakdown phenomena in gases. Also, the discharge is another factor.