Explanation

The atmosphere is the gaseous layer that surrounds the Earth.

It is composed mainly of nitrogen, oxygen, and trace gases.

It plays a crucial role in protecting life on Earth by filtering harmful radiation and regulating temperature.

Explanation

The migration of people from rural to urban areas increases the demand for housing, often outstripping supply.

This rapid urbanization leads to overcrowding and a shortage of affordable housing in big cities.

Explanation

Petroleum, coal, and natural gas are all fossil fuels formed from the remains of ancient plants and animals.

They are non-renewable energy sources and major contributors to global energy production.

Explanation

Explanation

CFCs (Chlorofluorocarbons) are not produced by vehicles.

They are primarily released from refrigerants and industrial processes.

CO2, NO2, and CO are all pollutants emitted by vehicle exhaust.