What nature knows that humanity has forgotten

by Dr Debapriya Mukherjee                                  
Former Senior Scientist
Central Pollution Control Board

Human beings often treat nature as an unlimited storehouse, clearing forests, polluting rivers and degrading soil for immediate gain. Animals and plants, without environmental policies or scientific knowledge, survive through relationships with their surroundings and other forms of life. An elephant needs connected habitats; a bee depends on flowers; a tree supports organisms while drawing nutrients from the soil. Humans can understand these connections, yet too often act as if their consequences did not concern us.

Elephants remind us that habitats cannot survive as isolated islands. Elephants disperse seeds and shape vegetation through feeding. Roads, railway lines, mines and settlements can obstruct their movements, increasing the risk of accidents and encounters with people. An elephant entering a village may reflect not only animal behaviour but also habitat fragmentation or changes in access to food and water. Protecting elephants therefore means conserving the corridors connecting essential habitats, not merely preserving separate patches of forest.

Vultures reveal the value of nature’s unsung services. These scavengers consume carcasses and help remove decaying animal material. India’s vulture crisis, linked particularly to exposure to the veterinary drug diclofenac, showed how a chemical used for one purpose can disrupt a distant ecological process. A creature often dismissed as unattractive may perform a service whose loss has far-reaching consequences.

Bees and bats reveal the biological foundations of food security. Bees pollinate many crops and wild plants. Certain bats also pollinate flowers, disperse seeds or consume insects. Habitat destruction, pesticide exposure and loss of food sources can threaten these contributions. Agricultural success cannot be judged by yield alone; the health of pollinators and the wider landscape also matter.

Frogs can warn us of environmental disturbance. Many amphibians have permeable skin and depend on both aquatic and terrestrial habitats. Some populations are sensitive to pollution, pesticides, habitat loss and disease. Frogs also consume insects and provide food for birds, snakes and other animals. Their decline does not identify a particular pollutant by itself, but it can warrant investigation. A pond may still hold water while losing important elements of ecological health.

Earthworms and termites reveal the living world beneath our feet. Earthworms contribute to soil structure and organic-matter decomposition. Termites recycle plant material and influence soil formation in many environments. Alongside fungi and bacteria, these organisms sustain processes essential to soil health. This matters to agriculture: applying cow dung or vermicompost does not guarantee a good crop if soil conditions and nutrient requirements are unknown. Agricultural inputs should be chosen according to soil properties, water availability and crop needs.

Fig trees and native grasses show why conservation must respect each habitat’s character. Many fig species depend on specialised fig wasps for pollination, while their fruits feed birds, bats and other animals. Native grasses provide food and shelter for insects, birds and grazing animals. Planting trees everywhere is therefore not necessarily ecological restoration. Converting natural grasslands into tree plantations can damage habitats adapted to open landscapes. Conservation must protect the ecosystem suited to each place, not simply increase tree numbers.

Mangroves and wetland plants provide natural protection. Mangroves support wildlife, trap sediments in suitable conditions and can reduce wave energy and coastal erosion. Wetlands store water, provide habitat and cycle nutrients; some also help moderate flooding. Neither can prevent every cyclone or flood, but destroying these systems without assessing their functions may increase risks and the cost of protecting communities.

Nature is not a world of perfect cooperation. Predators hunt prey, plants compete for sunlight, and organisms sometimes harm one another. Its lesson lies instead in interdependence, environmental limits and the consequences of disruption.

Development is often measured through roads built, buildings completed and economic returns. These achievements matter, but the picture is incomplete when ecological damage is ignored or its costs are transferred to other communities. Science enables us to examine impacts before approving projects, protect wildlife corridors before they are severed, test soil before choosing inputs and assess wetlands before filling them. Knowledge, however, protects nature only when it influences decisions.

Nature does not ask humanity to abandon progress. It asks us to distinguish genuine progress from activities that destroy their own ecological foundations. A vulture, frog, bat, termite or fig tree may seem insignificant in isolation; their importance emerges through the processes they sustain.

The living world offers no simple moral sermon, but a scientific truth: a civilisation that neglects the ecological relationships sustaining life ultimately undermines its own future.