To my esteemed colleague,

Clean energy is in my opinion the most important issue facing human civilization. Not only is air, land and sea pollution negative at the environmental level but also in terms of public health.

Some possible ways to attain a clean energy future:

- Solar power: Harnessing the bounty of energy given to the Earth constantly by the sun. This is good because you do not require any additional fuel in order to operate.
- Wind power: Similar to solar but instead using the energy provided by the wind. Turbines can be placed in low population areas and even out at sea to cause the least inconvenience to people as possible.
- Hydroelectric or hydrothermal power: Depending on location and geography using the energy of the rivers and geothermal systems can be a substantial source of clean power.
- Nuclear fission: Currently operating nuclear power plants are fission reactors. In terms of carbon emissions nuclear fission is neutral. It is also one of the safest forms of power generation and does not require large amounts of rare earth metals and fabrication unlike solar panels.
- Nuclear fusion: Research is ongoing to figure out the viability of nuclear fusion as a power source but it has shown the most potential for sustainable, reliable and safe energy production.

I hope this helps you to better understand the importance of clean energy and spurs you on to do more research on the subject.

Sincerely,
Your colleague
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