Tag: the environment and us

In a reciprocal cross, a male expressing the trait of interest will be crossed with a female not expressing the trait or vice versa. The method can be used for the protection of white lions from getting extinct as some white lions will be produced in the progeny. There are fewer than 12 White Lions in the wilds of their endemic habitat. The need for conserving white lions is extreme now.

• The contamination of soil with solid waste, acid rain excess of fertilizers, Insecticides, and herbicides is called soil pollution.
• Soil pollution can lead to water pollution if toxic chemicals leach(drain away from the soil) into groundwater, or if contaminated runoff reaches streams, lakes, or oceans.
  
• Hence Soil pollution can lead to water pollution is a true statement.
• So, the correct answer is 'True'.

As a result of various activities of mankind, our environment is getting increasingly polluted. pollutants are of 2 types: Biodegradable and non-bio degradable

• Soil pollution is defined as the presence of toxic chemicals (pollutants or contaminants) in soil, in high enough concentrations to pose a risk to human health and/or the ecosystem.
• Soil pollution causes digestive problems such as diarrhea, abdominal pain, etc. Soil pollution can also cause a neuromuscular blockage as well as depression of the central nervous system, headaches, nausea, fatigue, eye irritation, and skin rash.
  
• Hence Soil pollution can cause digestive problems is a true statement.
• So, the correct answer is 'True'.

• Soil pollution is defined as the presence of toxic chemicals (pollutants or contaminants) in soil, in high enough concentrations to pose a risk to human health and/or the ecosystem.
• The effects of soil pollution are:
• Sewage sludge is contaminated with pathogenic bacteria, viruses, and worms.
  
• Loss of fertility of soil.
• Results in Various diseases related to the digestive system.
• So, the correct answer is 'All the above'.

• Soil pollution is defined as the presence of toxic chemicals (pollutants or contaminants) in soil, in high enough concentrations to pose a risk to human health and/or the ecosystem.
• Due to the soil pollution the harmful chemicals present in the soil increase toxicity so soil fertility decreases and yield of soil is also decreased. Hence soil pollution affects the productivity of the soil.
• Hence Soil pollution does not affect the productivity of the soil is a wrong statement.
• So, the correct answer is 'Option B'.

Negative soil pollution occurs because of overuse of soil & its erosion thereby decreasing soil productivity. For example soil salinity due to over irrigation.

Reforestation is the natural or intentional restocking of existing forests and woodlands (forestation) that have been depleted, usually through deforestation. Reforestation can be used to rectify or improve the quality of human life by soaking up pollution and dust from the air, rebuild natural habitats and ecosystems, mitigate global warming since forests facilitate biosequestration of atmospheric carbon dioxide, and harvest for resources, particularly timber, but also non-timber forest products. Reforestation usually involves replanting areas of forest which have previously been damaged or destroyed, using native tree species. Sometimes forests are able to regenerate naturally if sufficient trees remain nearby and seeds can be dispersed into the deforested areas via animals or wind. However, areas of forest which have been severely degraded are unlikely to be able to regenerate naturally and need to be replanted by hand using native tree species.