Prototype:- 

Wind turbines work on a simple principle: instead of using electricity to make wind like a fan wind turbines use wind to make electricity. Wind turns the propeller-like blades of a turbine around a rotor, which spins a generator, which creates electricity

We know that these days energy is generated by burning fossil fuels, and fossil fuels are one of the main cause of climate change. So we must prevent it as much we can 

So by using windmills, we can generate electricity through wind and can reduce the use of fossil fuels, hence decreasing climate change.

Prototype
Wind Turbine
It requires no fossil fuel which makes it a pollution free and environmentally friendly equipment to harness wind energy day and night.

The objective is to design and build a system which comprises a wind speed stimulator, a wind turbine whereby when the wind turns the blades, it spins a shaft which drives a permanent magnet alternator and generates electricity.

The aim of this project is to harness wind energy and generate electricity at a minimum wind speed .

Prototype-
Seed balls
The most crucial part to tackle climate change is to grow more and more trees.
In nature no one grows the trees...When the fruits are eaten by birds and animals, the seeds don't get digested and they get dispersed by their poop. But in urban cities already there are less birds and animals and the whole area is also cemented.

So these balls can be used to disperse the seeds. It just needs to be thrown at empty places. And takes few ingredients and time to make.

It has seeds of trees in it with a hard out covering of soil (Clay+manure+water).
This becomes soft when comes in contact with water/moisture and the saplings sprout.