What is the effect of an imbalance between the number of males and females in the prime marriage ages?

It is called Marriage squeeze it is the effects of an imbalance between the number of males and females in the prime marriage ages due to rising of falling birth rates and the median age differences at marriage. going green people who are mindful of what they consume mindful of others, they want want to conserve energy. 

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.