Explanation

Nitrogen (N₂) makes up 78% of Earth's atmosphere and is not a pollutant.

NO₂ and SO₂ are major air pollutants from vehicles and industries.

Explanation

A nebula is a giant cloud of dust and gas in space.

Some nebulae come from the gas and dust thrown out by the explosion of a dying star, such as a supernova.

Explanation

Grass is a tree which means بانس 

Bamboo is mostly found in Asia, Africa, South America, and parts of North America

Bamboo releases 35% more oxygen than hardwood forests of equivalent sizes

• Bamboo is the fastest-growing plant. 
• Bamboo blossoms once a lifetime of a human.
• Bamboo can thrive without much care. 
• Bamboo is the world's tallest grass. 
• Bamboo can live for a century or more.
• Bamboo has been used as an alternative building material for centuries.

SH10-8-2023

Explanation

The stratosphere is a layer of Earth's atmosphere. It is the second layer of the atmosphere as you go upward. It is present about 30miles (50km) in atmosphere above earth.

Explanation

Climate change leads to more frequent and intense floods, droughts, heatwaves, and glacial melting in Pakistan.

These events severely impact agriculture, water resources, and human health.

It posing a major threat to the country’s economy and livelihoods.

Explanation

Condensation is the process where water vapor in clouds cools down as it moves through colder regions, turning into liquid water (rain) or solid ice (snow).

This process is a key part of the water cycle.

Explanation

Radio waves are  Electromagnatic waves

  with the longest wavelengths in the electromagnetic spectrum, typically with frequencies of 300 gigahertz 

Radio waves were first predicted by the theory of electromagnetism proposed in 1867 by Scottish mathematical physicist James Clerk Maxwell

SH5-8-2023

Explanation

Greenhouses are structures designed to provide an optimal environment for plants, particularly during colder seasons.

They trap sunlight, creating a warmer, more stable temperature that promotes plant growth in winter or colder climates.

Explanation

Nuclear energy is produced by splitting atoms (fission) and relies on uranium, a finite resource, making it non-renewable.

Renewable sources like solar, geothermal, and biomass naturally replenish over time.

Explanation

Uranium is a non-renewable energy source used in nuclear power plants for generating electricity through nuclear fission.

It is finite and cannot be replenished on a human timescale, unlike renewable energy sources such as solar or biomass.