The existence of Lead (Pb) pollutants in the air that generated by motor vehicle exhaust emissions determined by how large the influence of temperature and humidity tend to change according to time and weather influences. Temperature and humidity Changes in the earth's surface due to solar radiation in the morning-afternoon-evening will give change in the concentration of Pb in the air. With the days variation will be seen the influence of weather that gives the difference in temperature and humidity of each day so that the concentration of Pb in air pollutants, will be varied. This research looked at the extent to which the effect of environmental factors influence, like the temperature and humidity of the Pb concentration in the air. Sampling carried out based on the variation of the morning, afternoon and evening and Sunday till Monday variation. Temperature, humidity and weather conditions were measured and observed directly in the field, while Pb concentrations were analyzed in the laboratory. The results obtained were compared with each other. The results showed that the highest concentration of Pb in the morning, because in the morning the temperature more lower at the Earth's surface and humidity tends to be high which causes pollutants become hard to diluted and difficult to dispersed vertically upwards.Until the Earth's surface temperature rises, along with the increasing of solar radiation which causes the air temperature rises and air expands so as pollutants become diluted. On rainy days where the temperature drops and the humidity rises, the Pb concentrations tend to be higher. The results that obtained also show that the traffic density factor can not be ignored and can affect the the concentration of Pb in the air.

COMPOSTING TRAINING FOR YOUTH AT RAUDHATUL ISLAMIYAH MOSQUE KUBU RAYA REGENCY. Youth of Raudhatul Islamiyah Mosque is one of the youth Muslim organizations who live in Central Java Village, Ambawang District, Kubu Raya Regency. Even though they are based on Islam, mosque youth are not only engaged in religious activities. Several activities have been carried out at that location and the participation of the youth of the mosque is very good, this is proven by the well-maintained tools that have been given and the routine activities that are carried out in mutual cooperation. In previous activities, community services were also carried out in the form of socializing the sorting of organic and inorganic waste and providing composting tools on a small scale, but the interest of mosque youth in processing waste, especially organic waste, needs to be facilitated. In this activity, socialization and training on composting were carried out, as well as the provision of composting equipment on a large scale. Mosque youth are actively involved in socialization and training activities. After the socialization, training, and mentoring activities, it is hoped that the youth of the mosque can develop the knowledge that has been obtained for a wider scope and can be applied in their respective neighborhoods so as to reduce the volume of organic waste.

Pb concentration in the air mostly come from motor vehicle exhaust. There is a correlation between the levels of activity of motor vehicles with Pb concentration in the air. Research which is a combination of field and laboratory research is seeing Pb concentrations in the air at  Jalan H. Rais A. Rahman, Sei Jawi Dalam Pontianak which is one of the areas with the densest vehicle activity in Pontianak, in different variations and then compared with the standard quality. This study consists of three variations, namely variations days (Monday till Sunday); variations in time (morning, afternoon, evening); height variation (1 m, 1.5 m, 2 m) were determined on the day and the maximum time to see the horizontal dispersion concentration of Pb in the air. With comparative and tabulation method and sought the maximum Pb concentration in time, the day and altitude. Based on the research results, obtained maximum Pb concentration in the morning and the minimum in the afternoon, except on Friday and Saturday, where the concentration of  Pb afternoon more than the concentration in the afternoon. At the time of maximum Pb concentration morning on Monday and the minimum on Sunday. Tests were carried out on Monday morning, said that a Pb concentrated at a height of ± 1.5 meters from the ground is 4.130 ppm.