Poisoning the land - pytania i odpowiedzi

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sākt mācīties

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jautājums		atbilde
How can soil be renewed? sākt mācīties		trzeba to skrócić
What are the 3 biggest sources of pollution in agriculture? sākt mācīties		The 3 biggest sources of pollution are pesticides, fertilizers and clearing vast areas for farming.
How is soil destroyed mechanically? sākt mācīties		Soil can be destroyed mechanically by bulldozers which dig up soil and vegetation.
What heavy metals contaminate soil in mining areas? sākt mācīties		In mining areas soil is contaminated by three heavy metals such as lead, zinc and manganese.
How can landfills pollute soil and be dangerous for people? sākt mācīties		Landfills can pollute soil and be dangerous for people because not all poisonous wastes are buried. Some of poisonous wastes can leak from their containers into the soil.
How can we degrade oil? sākt mācīties		Thanks to new kinds of bacteria (if scientists develop them).
How can beaches be polluted? sākt mācīties		Beaches can be polluted by domestic and industrial wastes such as empty milk cartons, bottles or plastic bags, by wastes from hospital such as syringes and blood samples (and by oil split).
What are dioxin? sākt mācīties		Dioxins are produced when plastic and other products made from chlorine are burnt.
What is lead dangerous for humans? sākt mācīties		Lead can cause damage to the brain and nervous system.
What chemical compounds are formed in the atmosphere? sākt mācīties		In the atmosphere are formed two chemical compounds. It is sulphuric acid and nitric acid. Sulphuric acid and nitric acid are formed in the atmosphere.
When can radioactive substances pose a threat to humans? sākt mācīties		Radioactive substances pose a threat to humans when they are in high level.
How can waste be reduced? sākt mācīties		Wastes can be reduced if we recycle them and learn to depend on less hazardous forms of energy.

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