Discuss in brief the following: Carbon footprint vis-a-vis Ecological footprint.

A carbon footprint is an estimate of how much carbon is produced to support your lifestyle. Essentially, it measures your impact on the climate based on how much carbon you produce. Factors that contribute to your carbon footprint include travel methods and general home energy usage. Carbon footprints can also be applied on a larger scale to companies, businesses and even countries. The word 'carbon' in the phrase 'carbon footprint' is often used as a short-cut to describe the main greenhouse gases - carbon dioxide, methane and nitrous oxide - in terms of carbon dioxide equivalents. Ecological footprint is a measure of human demand on earth's eco-systems. It compares human demand with planet earth's ecological capacity to regenerate it. It represents the amount of biologically productive land and sea area needed to regenerate the resources a human population consumes and to absorb and render the corresponding waste harmless, given prevailing technology and resource management practices.