Greens In Peril
The future of every country in the world, including India, or at least its ability to feed its people, depends on the health of its soil. Land is also the habitat of a gigantic number of plant and animal resources that are a human’s insurance for survival. So land is of enormous ecological, economic and social value.
What is the status of our country’s land resources? Agricultural scientists say that India has enough to feed even twice its existing population—but only if the soils are managed well. At present, complete mismanagement prevails and a mammoth portion of India’s total land area—more than 25 million hectares—is seriously degraded. The prime factors contributing to this are large-scale soil erosion and water stagnation that turns soil saline, and overuse of chemical fertilizers and pesticides.
Plant and animal life, as have evolved on earth, are bewilderingly diverse. Millions of species of plants and animals exist, but even within a species there is enormous diversity. For instance, there are an estimated 1,20,000 types of rice plants in the world. This massive diversity, or gene pool as scientists call it, is a common heritage of all human beings. It is also their insurance for survival. As new varieties of plants and animals useful to human beings are bred, this massive gene bank provided by nature becomes vitally important.
In certain areas of our country, hundreds of hectares of fertile topsoil, containing precious nutrients like nitrogen, phosphorous and potassium, get washed away annually. While there are several reasons behind this huge scale of erosion, degrading forest lands is certainly one of the leading ones.
Ambitious afforestation schemes were introduced in the 1980s in India, as the country was losing almost a million hectares of forest cover every year. Social forestry programmes enlisting the help of local rural communities were spearheaded. These efforts paid dividends, and the total area under green cover has grown during the past decades.
But though long-term afforestation measures have been able to contain the pace of forest cover loss, land under dense forests is shrinking steadily. Today, India is dotted with large, severely degraded tracts that according to the official records are forestlands, but not a single tree can be found on them!
Indian soils are generally poor in plant nutrients like nitrogen, phosphorous and potassium. So the government encourages farmers to use large quantities of chemical fertilizer to ensure high yield. In the long run, however, indiscriminate use of these chemicals has proved to be dangerous for the fertility of the soil.
The other types of chemicals that are used in farmlands are in the form of pesticides. India is a voracious consumer of pesticides. The total demand for insecticides here is over 1,00,000 metric tonnes (MT) for agriculture and 50,000 MT for public health.
And Their Deadening Impact
Nearly all these chemicals have the potential to significantly alter ecosystems; many are toxic to humans and others are concentrated in the food chain. Once applied to cropland, a number of things may happen to a pesticide. It may be taken up by plants or ingested by animals, insects, worms or microorganisms in the soil.
Extensive studies the world over have shown how pesticides affect soil health by killing vital microbial fauna present in it. Each gram of soil may contain millions of microbes that are important to sustain plant life. Pesticides not only kill these microbes, but persist in the environment and have been observed to accumulate in the food chain. It is due to their tendency to accumulate in animal fatty tissue and move up the food chain that their residues have been found even in mothers’ milk
If soil is contaminated by this poison how can our bodies remain immune to it? Pesticides which enter the human system are potent enough to ravage our metabolism. They are now known to cause lethal diseases, ranging from several kinds of cancer, liver damage and reproductive dysfunction to neurological disorders like Parkinson’s and Alzheimer’s.
Rich Soils, Live Treasure
The Indian subcontinent, with its vast range of ecological zones, sustains diverse life forms. This rich diversity contributes enormously to the economy. Unfortunately, a massive portion of this wealth is being threatened by human activity on land and forests. Plant species face extinction, and many may be lost even before their possible value is known to society. Wildlife is threatened by large-scale poaching, fuelled by a flourishing trade in wildlife products.
Habitat destruction and disappearing wetlands have also taken a heavy toll of bird life in India.
So What Do We Do?
Your school grounds can provide excellent educational opportunities for creating awareness about land resources and the natural world around you. A proper management of land resources can transform the grounds into biologically diverse outdoor classrooms and healthy open spaces.
The green area in your school has an important role because on one hand it minimizes the effects of air pollution and on the other it gives you an opportunity to explore local species of plants and animals.
So, ensure that 11 per cent of the total area of the school is under tree cover.