"Humans are the most dangerous animals on this planet". The burning of fossil fuels and the release of carbon monoxide by vehicles are human activities that emitting harmful gases into the atmosphere. Greenhouse gases and aerosols affect climate by altering incoming solar radiation and out radiation that are part of Earth’s energy balance. Deforestation also releases carbon dioxide and reduces its uptake by plants. Humans uses these spaces to build parketing lots and malls not taking note of the effect on our environment.