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what is the air pollution index bitesize

Answer 1

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Air pollution



Factories can cause air pollution

The most common source of air pollution is the combustion of fossil fuels. This usually happens in vehicle engines and power stations.

Some common air pollutants and their effect

pollutanttypical effectsmokeDeposits soot on buildings and trees, causing them damage. Permeates the air, making it difficult for living creatures to breathe.carbon monoxidepoisonous gascarbon dioxidegreenhouse gas that contributes to global warmingsulfur dioxidecontributes to acid rain

Indicators of air pollution

Lichens are plants that grow in exposed places such as rocks or tree bark. They need to be very good at absorbing water and nutrients to grow there, and rainwater contains just enough nutrients to keep them alive. Air pollutants dissolved in rainwater, especially sulfur dioxide, can damage lichens, and prevent them from growing. This makes lichens natural indicators of air pollution. For example:

bushy lichens need really clean airleafy lichens can survive a small amount of air pollutioncrusty lichens can survive in more polluted air

In places where no lichens are growing, it's often a sign that the air is heavily polluted with sulfur dioxide.

Answer 2

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• The Air Pollution Index (API) is a simple and generalized way to describe the air quality, which is used in Malaysia. It is calculated from several sets of air pollution data and was formerly used in mainland China and Hong Kong.