Question

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c) what is effects of pollutants on soil?​

Answer 1

Answer:

if an object of 7 cm heght is placed at a distance of 12 cm from a convex lens of focal length 8 cm foind the position,nature and height of image

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Answer 2

1. Soil pollution affects everything. The food we eat, the water we drink, the air we breathe – our health and the health of all the organisms on the planet is dependent on healthy soil. The nutrient content of a plant’s tissues is directly related to the nutrient content of the soil and its ability to exchange nutrients and water with the plant’s roots.

2. Soil pollution is invisible. Today, one third of our soils are moderately or highly degraded due to erosion, loss of soil organic carbon, salinization, compaction, acidification and chemical pollution.  It takes about 1 000 years to form 1 cm of top soil, meaning that we won’t be able to produce more soil within our lifetime. What we see is all there is. Yet, soils are facing even more pressure from soil pollution. The current rate of soil degradation threatens the capacity of future generations to meet their most basic needs.

3. Soil pollution affects soils’ capacity to filter. Soils act as a filter and buffer for contaminants. The potential of soil to cope with the strain of pollutants is finite. If soil’s capacity to protect us is exceeded, contaminants will (and do) seep into other parts of the environment – like our food chain.

4. Soil pollution affects food security by reducing crop yields and quality. Safe, nutritious and good quality food can only be produced if our soils are healthy. Without healthy soils, we won’t be able to produce enough food to achieve #ZeroHunger.

5. Soil pollution can be a result of poor agricultural practices. Unsustainable agricultural practices reduce soil organic matter, compromising soils’ capacity to degrade organic pollutants. This increases the risk of the pollutants being released into the environment. In many countries, intensive crop production has depleted the soil, jeopardizing our ability to maintain production in these areas in the future. Sustainable agricultural production practices have therefore become imperative for reversing the trend of soil degradation and ensuring current and future global food security.

6. Soil pollution can put our health at risk.  A significant proportion of antibiotics, used widely in agriculture and human healthcare, are released into the environment after being excreted from the organism to which they were administered. These antibiotics can seep into our soils and spread throughout the environment. This creates antimicrobial resistant bacteria, which decreases the effectiveness of antibiotics. Each year around 700 000 deaths are attributable to antimicrobial resistant bacteria. By 2050, if not tackled, it will kill more people than cancer, and cost, globally, more than the size of the current global economy.