2. What is Green Technology?
Environmental technology (envirotech), green technology (greentech) or
clean technology (cleantech) is the application of one or more of
environmental science, green chemistry, environmental monitoring and
electronic devices to monitor, model and conserve the natural
environment and resources, and to curb the negative impacts of human
involvement. The term is also used to describe sustainable energy
generation
9. 1. It minimizes the degradation of the environment.
2. It has a zero or low green house gas (GHG) emission.
3. It is safe for use and promotes healthy and improved environment.
4. It conserves the use of energy, natural and renewable resources.
5. It increases the quality of life and health standards since it minimizes
pollution to a great extent.
6. an alternative to improving the national economy without harming the
environment
10.
11.
12. Wind Energy and Wind Energy
A wind turbine is a device that converts kinetic energy from
the wind, also called wind energy, into mechanical energy;
a process known as wind power.
13.
14. A solar cell (also called a photovoltaic cell) is an electrical device that
converts the energy of light directly into electricityby the photovoltaic effect.
It is a form of photoelectric cell (in that its electrical characteristics—e.g.
current, voltage, or resistance—vary when light is incident upon it)
which, when exposed to light, can generate and support an electric current
without being attached to any external voltage source
15. Hydrogen Fuel Cell
The hydrogen fuel cell operates similar to a
battery. It has two electrodes, an anode and a
cathode, separated by a membrane. Oxygen
passes over one electrode and hydrogen over
the other.
16. Hydro-electricity uses the energy of
running water to make electrical
energy. Hydro-electric stations are
built where there is running water.
Most hydro-electric stations are
located in dams where water is
stored. But hydro-electric stations can
also be built on rivers and near
waterfalls.
17.
18. 1. Taking major steps to go green such as
adding new insulation, roofing or windows to a home can require
a large capital investment
Virtually all of the green energy
technologies face some kind of significant technological hurdle.
. The cost reductions in energy savings
gained by going green are not always enough to offset the initial
upfront conversion costs
Adopting a green lifestyle can often be time-consuming for
those who are fully committed to green living
:-Going green can also potentially have a
negative effect on the environment sometimes.
19. Although there are some defects of green technology, every
thing done should have both positive impacts and negative
impacts. Since we are now still at a starting stage of developing
green technology, some defects are due to its immature. For
example, defects like low efficiency can be solved, when we
keeping on putting effort in doing research and improvement. In
fact, one of us will agree that problems like global warming and
energy crisis can not be solved within one or two years. It really
requires our determination and continue effort in improving the
situation. Green technology will definitely be the solution that
gets the potential in helping us to solve those problems and
improve our environment
