LI: To understand and know about industrial pollution.
Let’s start with some questions to understand some of the vocabulary used and how much we know on the subject:
What does industrial mean?
What is industrial pollution?
What are the pollutants of industrial pollution?
What does industrial pollution affect?
The following short video is about a piece of American news on industrial pollution and how many factories do not follow the guidelines to protect the environment. Informative and a good introduction to the lesson.
What do you think about this piece of news?
Does it upset you, why?
While sharing with the children the information below, ask children to jot key information on their whiteboards to use it later on in their task.
Many industrial manufacturing processes use or produce chemicals that may harm people’s health or the environment.
For instance, paper pulp bleaching uses chlorine (Chlorine is a naturally-occurring chemical element, one of the basic building blocks of matter.) … Chlorine chemistry provides clean drinking water to millions around the globe. Clean drinking water made possible with chlorine disinfectants is a monumental triumph over the scourges of waterborne disease.
Its disinfection properties have helped improve the lives of billions of people around the world. Chlorine also is an essential chemical building block, used to make many products that contribute to public health and safety, advanced technology, nutrition, security and transportation.
Food, water and medicines, computers and cell phones all depend on chlorine chemistry. Chlorine chemistry also is used in the manufacture of numerous products ranging from contact lenses, air conditioning refrigerants and solar panels, to bullet-resistant vests, energy-efficient windows, paint, and prosthetics.
Chlorine is produced from ordinary salt – one of the most abundant, essential minerals on earth.), while power generation using coal creates acid rain. Although factory chimneys producing black smoke are rare in most industrial nations these days, invisible pollutants may still enter the air, ground, or surface water. Even at low levels, they may cause harm, particularly in the long term.
Environmental law now requires industry to take more responsibility for any emissions that could harm the environment. Ongoing independent monitoring of the air and water supply are necessary to check for any breaches of the legislation. Cleaner technologies, including green chemistry, can reduce the production of pollutants from their source.
At this point, it is crucial to understand what are substances have played a major role in our history and have caused pollution over the centuries:
Coal was the predominant source of fuel. Its potential to pollute arises from its sulfur (S) content, which can be as high as 10%. Coal also contains significant amounts of toxic heavy metals, including lead (Pb), cadmium (Cd), and mercury (Hg), which remain in the ash when it is burned.
Oil began to grow in importance as a fuel in the early part of the twentieth century. By the 1940s, a massive petrochemical industry had grown up, using petroleum as a raw material for the synthesis of a range of new organic compounds, including plastics, pesticides, and pharmaceuticals.
Any modern industry has the potential to produce some pollution. Often this is in the form of wastewater that has been used in processing or for cleaning equipment and has thereby become contaminated with pollutants.
Some byproducts of industrial processes are polluting, such as the toxic dioxins (C4H4O2) produced in the manufacture of certain herbicides, or the acidic sulfur dioxide (SO2) produced by burning coal.
The paper and pulp industry has attracted criticism from environmental campaigners in the past over its use of chlorine as a bleaching agent. The chlorine combines with organic compounds in the wood to make a number of hazardous organochlorine compounds, including furans (C4H4O) and dioxins. There has been a move within the industry toward chlorine-free technology, but this is not yet universal.
The chemical industry has produced thousands of synthetic compounds with a very wide range of applications that are often taken for granted in everyday life.
These compounds are xenobiotics (SEE Vocabulary BANK at the bottom), which means they do not occur in nature and may take a long time to break down in the environment by microbial action.
One example would be the relative rates of decay of a paper bag and a plastic bag, left out to rot. Paper is based on cellulose, a natural material, and is therefore biodegradable. It will take two to five months to rot away, but the plastic bag will, according to laboratory estimates, take 500 to 1,000 years.
Plastic is not, in itself, harmful, so the main problem with plastic bags is that they take up space in expensive landfills. Other synthetic organic compounds pose a far greater threat to the environment.
This first lesson aims to generate a background knowledge with some details around industrial pollution which has an effect on different areas of our environment: soil, air and water. Obviously, the impact on humans and animals has been great over the centuries.
Activity: Children will be using the information collected during the teaching input + class sharing of previous knowledge to create a summary of what industrial pollution is. (Display for them on the board key vocabulary that they want to use, but they might not remember).
Children to write their impressions, what they think and feel on this topic and what could be done to change the present situation.
Chlorine is a naturally-occurring chemical element, one of the basic building blocks of matter. … Chlorine chemistry provides clean drinking water to millions around the globe. Clean drinking water made possible with chlorine disinfectants is a monumental triumph over the scourges of waterborne disease.
Sulfur: it is a substance that make coal content. Coal also contains significant amounts of toxic heavy metals, including lead (Pb), cadmium (Cd), and mercury (Hg), which remain in the ash when it is burned.
Compound: a thing that is composed of two or more separate elements; a mixture.
Xenobiotics: which means they do not occur in nature and may take a long time to break down in the environment by microbial action.
Microbial: microbes like bacteria