Excessive use of fossil fuels such as petroleum produced by vehicles causes the addition of a gas in the atmosphere.

Hazardous gases such as carbon dioxide, carbon monoxide, and many others are released into the air, contributing to adverse air conditions,

Creating urban heat islands. Due to the predicted global temperature rise, the climate tends to be more uncomfortable in Malaysia, when an increase in heat pressure is expected. As the phenomenon of the urban hot islands (UHI) worsens heat stress, the effect will be worse in the urban environment.

 Increased respiratory problems to humans and animals, Climate change will increase the frequency and intensity of floods and cyclones and thus fungal spore production, powerful asthma, and rhinitis trigger.

Greenhouse effects, Solar radiation reaches the Earth's atmosphere - some of this is reflected back into space. The rest of the sun's energy is absorbed by the land and the oceans, heating the Earth. Heat radiates from Earth towards space. Some of this heat is trapped by greenhouse gases in the atmosphere, keeping the Earth warm enough to sustain life. Human activities such as burning fossil fuels, agriculture, and land clearing are increasing the number of greenhouse gases released into the atmosphere. This is trapping extra heat, and causing the Earth's temperature to rise. and even

Depleting the ozone layer that will make our world hotter. The depletion of the ozone layer has harmful effects on the environment.