Explanation

Chlorofluorocarbons (CFCs) and other halogenated ozone-depleting substances (ODS) are mainly responsible for man-made chemical ozone depletion.

ozone is made up of O3

اوزون فضا میں آکسیجن کی تہہ

اوزون ہمیں سورج کی نقصان دہ الٹرا وائلنٹ شعاعوں سے بچاتا ہے۔

اوزون فارمولا: O3

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ND31-12-2022

Explanation

Explanation

The most popular renewable energy sources currently are:

1.      Solar energy

2.      Wind energy

3.      Hydro energy

4.      Tidal energy

5.      Geothermal energy

6.      Biomass energy

RK12-12-2022

Explanation

The troposphere is the lowest layer of Earth's atmosphere.

Most of the mass of the atmosphere is in the troposphere.

Most types of clouds are found in the troposphere, and almost all weather occurs within this layer.

Major layers are 

troposphere

stratosphere

mesosphere

thermosphere 

exosphere

Explanation

• 99.9% to 100% of the energy entering the earth's atmosphere comes from the sun.
• 51% of the incoming energy is absorbed by the earth's surface i.e. the land and oceans.
  

Explanation

• A lake starts freezing because of the cold atmosphere. It will first freeze At the top surface
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• concept:
• when the water freezes to ice, the ice becomes significantly less dense than the water and continues to float on the lake's surface.
• Below 4° Celsius, water becomes less dense as it gets colder, causing water to freeze to float to the top.
  
  

Explanation

The atmospheric pressure at any place is measured by a Barometer

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The barometer was invented by Evangelista in 1644.

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Explanation

In fact, Agricultural Production consumes more fresh water than any other human activity.

 agriculture accounts (on average) for 70 percent of all freshwater withdrawals globally

Explanation

Singular noun: Leave 

Plural noun: Leaves 

Leave means پتہ

Explanation

Chlorophyll is a green pigment found in the chloroplasts of plant cells and is essential for photosynthesis

The process by which plants convert light energy into chemical energy to produce sugars from carbon dioxide and water.

Chlorophyll absorbs light energy, particularly in the blue and red regions of the visible spectrum,

While reflecting green light, giving leaves their characteristic green color.

This absorption of light energy by chlorophyll initiates the process of photosynthesis, allowing plants to produce their own food.