Green House Effect

— Process by which thermal radiation from a planetary surface is absorbed by atmospheric greenhouse gases, and is re-radiated in all directions. 

Has climate change been caused by humans?

—The global scientific report blaming carbon emissions for climate change is based on misconceptions about the Earth's behaviour. Australian academic  hypothesis.

 —The Industrial Revolution has contributed to a rise in greenhouse gases in the atmosphere. The energy sector is responsible for about ¾ of the carbon dioxide emissions, 1/5 of the methane emissions and a large quantity of nitrous oxide. It also produces nitrogen oxides (NOx) and carbon monoxide (CO) which are not greenhouse gases but do have an influence on the chemical cycles in the atmosphere that produce or destroy greenhouse gases.

Climate Changes

—The earth's climate is dynamic and always changing through a natural cycle. What the world is more worried about is that the changes that are occurring today have been speeded up because of man's activities. These changes are being studied by scientists all over the world who are finding evidence from tree rings, pollen samples, ice cores, and sea sediments. The causes of climate change can be divided into two categories - those that are due to natural causes and those that are created by man. 

—Climate change is a significant and lasting change in the statistical distribution of weather patterns over periods ranging from decades to millions of years.