The dependence of two or more people or things on each other.
Interdependence
It occurs when harmful substances—often chemicals or microorganisms—contaminate a stream, river, lake, ocean, aquifer, or other.
Water pollution
A substance used for destroying insects or other organisms harmful to cultivated plants or to animals.
Pesticides
A chemical or natural substance added to soil or land to increase its fertility.
Fertilizers
Supply water to (land or crops) to help growth, typically by means of channels.
Irrigate
A cultivated plant that is grown as food, especially a grain, fruit, or vegetable.
Crops
The presence in or introduction into the air of a substance which has harmful or poisonous effects.
Air pollution
They are the gas or steam that is produced when the engine of a vehicle is running.
Exhaust fumes
A natural fuel such as coal or gas, formed in the geological past from the remains of living organisms.
Fossil fuels
It is an agency from the US whose mission is to protect human and environmental health.
The EPA
It is an agency of the UN whose mission is to research and promote health at a global level.
The WHO agency
Is a toxic chemical often found in groundwater sources that are close to mineral deposits.
Arsenic
This event happens when wastewater with human excrement is being transported and it overflows or spills into the environment.
A sewage spill
Is a toxic pollutant emitted by factories into the atmosphere.
Chloroprene
It is a type of mud that has toxic chemicals like lead and arsenic, and it is often found close to mining operations.
Heavy Metal Sludge
