Biomass is biological material derived from living or recently living organisms. It is composed of carbon-based organic molecules containing hydrogen, oxygen, nitrogen, and sometimes other atoms. The carbon used to construct biomass is absorbed from the atmosphere by plants through photosynthesis. If plant material is not eaten, the carbon is either broken down and released back into the atmosphere as carbon dioxide or methane by microorganisms, or released as carbon dioxide if the plant material is burned. This process is part of the natural carbon cycle.

2. What is Biomass
Biomass is biological material derived from living,
or recently living organisms. In the context of
biomass for energy this is often used to mean
plant based material, but biomass can equally
apply to both animal and vegetable derived
material.

3. Chemical Composition
Biomass is carbon based and is composed of a mixture of
organic molecules containing hydrogen, usually including
atoms of oxygen, often nitrogen and also small quantities of
other atoms, including alkali, alkaline earth and heavy
metals. These metals are often found in functional
molecules such as the porphyrins which include chlorophyll
which contains magnesium.

4. Plant Material
The carbon used to construct biomass is absorbed from the atmosphere as
carbon dioxide (CO2) by plant life, using energy from the sun.
Plants may subsequently be eaten by animals and thus converted into animal
biomass. However the primary absorption is performed by plants.
If plant material is not eaten it is generally either broken down by micro-
organisms or burned:
If broken down it releases the carbon back to the atmosphere, mainly as
either carbon dioxide (CO2) or methane (CH4), depending upon the
conditions and processes involved.
If burned the carbon is returned to the atmosphere as CO2.
These processes have happened for as long as there have been plants on Earth
and is part of what is known as the carbon cycle.

6. Tidal Power

7. What is tidal power
O Tidal power is a technique to obtain
electricity from waves and tides which
occur in the sea.
O It is nearly same as hydro Power.
O It basically, exploits the movement of
water caused by tidal currents or the
rise and fall in sea levels due to tides.

8. Here is more clear idea of how Tidal
power works

9. Role of tidal power in
Pakistan
lacks in the projects of tidal power.
are multiple locations where tidal power can
be effective (e.g. creeks, open beaches)
the cost of installing tidal plants is high
as compared to the economy.
Pakistan sees into this matter there would be no
blackouts and industries would be able to work with
free electricity thus benefiting the economy.