The term carbon footprint has been growing in popularity over the past several years, primarily due to the heightened awareness of climate change. A carbon footprint consists of the net greenhouse gases emitted by an entity, individual, organization or nation. Personal carbon calculators define a carbon footprint as the net carbon dioxide attributable to an individual over a one year period. Since there are many different greenhouse gases, the specific gas(es) must be converted to tonnes or kilograms of equivalent carbon dioxide.
Very often, the term carbon footprint is confused with another term called ecological footprint. Carbon footprint only considers net greenhouse gases emitted, whereas ecological footprint is much more encompassing hotel furniture manufacturers The ecological footprint is a calculation of productive land and water required by an individual, both in terms of usage and also to absorb wastes that the individual produces. A carbon footprint is specified in tonnes or kilograms of carbon dioxide equivalent. An ecological footprint is expressed in terms of global hectares.
An ecological footprint is broken into four consumption categories: carbon, goods and services, housing and food. The carbon category includes transportation and home energy use. An ecological footprint can also be broken down by ecosystem types or biomes. These consist of forestland, pasture land, cropland and marine fisheries. In addition to consumption categories, waste must also be considered. Scientists have calculated the average per capita ecological footprint to be approximately 23.5 global hectares. On a renewable basis there are only 15.7 global hectares available meaning that we are collectively overshooting the Earth’s ecological capacity by almost 50%.
There are several ways of reducing both an individual’s carbon footprint and ecological footprint. One significant but controversial way is to shift from a meat to a vegetarian diet. According to a recent study, it was determined that a vegetarian diet was more environmentally friendly than a meat diet. It requires approximately 0.18 global hectares per person while a meat diet (high fat) requires almost five times as much, or 0.85 global hectares per person per year. There are many contributing factors for the meat diet, including deforestation and energy required for processing / transportation. And don’t forget cow flatulence. Scientists have estimated that the meat consumption life cycle contributes 18% of worldwide greenhouse gas emissions. More emissions results in larger effect on the climate.
Another method of reducing one’s ecological footprint is to buy local fresh food from farmers markets and preferably organically produced. It is important to eliminate transportation and refrigeration costs as much as possible. Organic foods eliminate the environmental impact of pesticides (including transportation and packaging). Farmers markets generally incorporate less packaging materials and food is fresh with no refrigeration or electricity requirements. More environmentally friendly all around.
When purchasing a new house there are many green initiatives that should be considered. Take advantage on the house orientation towards the sun for heating in the winter and cooling in the summer. Consider rooftop gardens and soil-less turf on outside walls as was showcased by the Beijing Olympic exhibition hall. Passive solar heating, water efficient fixtures, sustainable building materials and other green design features should be incorporated where possible.
Every year, we are subjected to erratic weather conditions. Summers are hotter, and there is less rain. Most of us are aware that this is due to the phenomenon called Climate Change, which is affecting all parts of the world. Let us examine why this is happening and the measures which can be adopted to prevent it.
A lot of the sun’s heat is reflected back into the atmosphere by the earth. A part of this heat is reflected back to the earth by a layer of gases in the earth’s atmosphere comprising mainly of carbon dioxide, methane, nitrous oxide, water vapor and ozone, thus warming the earth, and creating ideal conditions for supporting life. However, there has been a huge increase in the release of these gases, called the greenhouse gases, in recent decades, leading to Global Warming and Climate Change.
Though the release of greenhouse gases is due to both natural and human causes, the term Climate Change, used in the modern context, has been brought about mainly due to human causes. Scientists the world over are more or less agreed on this. Since the industrial revolution about 150 years ago, there has been a huge increase in the use of fossil fuels in factories the use of which releases a lot of carbon dioxide into the atmosphere. The widespread use of motor vehicles dependent on petroleum has also contributed to this phenomenon. Electricity generation, in many countries, is heavily dependent on coal, which again, releases green house gases. Afforestation, increase in livestock and the widespread use of chemical fertilizers have contributed their share in increasing greenhouse gases like methane and nitrous oxide.