Powering the Earth

The best way to power the Earth is to have an array of solar panels that are linked together by power lines. The power lines could cross the twilight daylight boundary and deliver power to places that are in the night time zone.

If China and Russia are in darkness then America could send their excess solar power to them. If America is in darkness then Europe to send power across Russia to supply the Americans. Sunlight is always touching one part of the Earth's Surface so power lines could redistribute the power to the dark side of the planet.

If we cooperated in the beginning then this would already be a reality.

5 Goals for mankind

Here are 5 goals that should unite all people in the world.

1) Cure cancer
2) End fossil fuel dependence
3) End poverty
4) Cure Aids
5) Build star ships

Bike road

We can build bike roads cheaply. Putting paint on one part of a foot path should be enough to be a good bike road. The paint does not need to take up the whole foot path, it only needs to take up part of it. 

Later, worn out car tyres can be shredded and made into rubber slabs that can form the bike road. The rubber slabs would allow the bike to have a smooth ride and help define the road.