What releases greenhouse gases?

Answer 1

Burning fossil fuels and cutting down trees releases carbons. Fossil fuels like coal, oil and natural gas release long held carbon when we burn them in vehicles or to make electricity. Half the weight of a tree is carbon, so when the tree rots or is destroyed (to make paper, for example), it releases all its carbon.

A significant part of the atmospheric carbon inventory is recycled due to the decomposition of organic material which converts the stored carbon in dead plant and animal material to carbon dioxide or methane.

Answer 2

Cars, all animal life, decaying tress and animal life. Nature emits about 95% of all CO2 through natural processes, man produces 5% through his demand for energy, about half of this for heating and cooling our homes and buildings.

Answer 3

anything that burns fossil fuels (oil, coal and natural gas)

going into more detail: fossil fuels contain hydrocarbons (hydrogen and carbon)

when burnt, energy is released and the carbon combines with oxygen as does the hydrogen, forming carbon dioxide and water. carbon dioxide as you might know is a greenhouse gas (i presume that you know what a greenhouse gas is). the same principal is followed when burning coal, however, chunks of coal are very likely to contain impurities such as sulphur which contributes to acid rain.

the processes that release greenhouse gases are for instance propelling vehicles and producing electricity. furthermore ghg's (greenhouse gases) can also be released in industrial processes such as manufacturing.