To meet increasing global demand for energy, while reducing the risk of either causing, damage to the environment or contributing to global warming, there are a number of challenges that need to be addressed:
The purpose of sustainability is to manage resources so future generations can use the resources too. International concern has led many countries to try to reduce their use and consumption of carbon-based fossil fuels.
This is a scheme aimed at reducing greenhouse gas emissions. It is based on the idea of the 'polluter pays' according to how much pollution they generate. The idea is that people are encouraged to pollute less, as it will cost them less in carbon taxes.