Abstract

This paper is an attempt to show that global warming and climate change are real, and are greatly affecting the biosphere. Evidences suggesting that the increasing concentration of atmospheric greenhouse gases due to human activities is mainly responsible for global warming and climate change are presented. Uncertainties about the future course of global warming and climate change centred on the role of two important mechanisms, forcings and feedback processes, and their influence on earth’s surface temperature are also discussed. Suitable and innovative geo-engineering measures that could make effective and efficient use of the scarce resources and maximize returns from the resources invested to limit the emissions of greenhouse gases are evaluated. Preferred actions to control and stabilize global warming and climate change which can be widely applied to reorient economic developmental policies in developing countries are examined.

Key words: Global warming, climate change, greenhouse gases, uncertainties, feedback mechanisms, measures.