For example the median expected annual pay for a typical Receptionist in the United States is $33,390, so 50% of the people who perform the job of Receptionist in the United States are expected to make less than $33,390. Percentile.
medhrk. The greenhouse effect is caused by the burning of fossil fuels and deforestation-is true. The burning fossil fuels leads to emission of CO2 in the air which is green house gas. deforestation makes the number of CO2 consumer less in quantity so increase CO2 level.
The main sources of greenhouse gases due to human activity are: 1  burning of fossil fuels and deforestation leading to higher carbon dioxide concentrations in the air. 2  Land use change (mainly deforestation in the tropics) account for up to one third of total anthropogenic CO 2 emissions. greenhouse gas (sometimes abbreviated GHG) is a gas in an atmosphere that absorbs and emits radiation within the thermal infrared range. This process is the fundamental cause of the greenhouse effect.