Tehran

Climate change refers to long-term shifts in temperatures and weather patterns. These shifts may be natural, but since the 1800s, human activities have been the main driver of climate change, primarily due to the burning of fossil fuels (like coal, oil and gas), which produces heat-trapping gases.
From the United Nations

Burning fossil fuels generates greenhouse gas emissions that act like a blanket wrapped around the Earth, trapping the sun’s heat and raising temperatures. Examples of greenhouse gas emissions that are causing climate change include carbon dioxide and methane. These come from using gasoline for driving a car or coal for heating a building, for example. Clearing land and forests can also release carbon dioxide. Landfills for garbage are a major source of methane emissions. Energy, industry, transport, buildings, agriculture and land use are among the main emitters.

1.Save energy at home 2.Walk, bike, or take public transport 3.Eat more vegetables 4.Consider your travel 5.Throw away less food 6.Reduce, reuse, repair, recycle 7.Change your home's source of energy 8.Switch to an electric vehicle 9.Make your money count 10.Speak up
Read more about it here.