The government should pass a law that all new houses must be fitted with solar panels. Costs (typically $3000 or £2000) would be split by the buyer and the house builder. Benefits to the environment would be massive. Imagine whole new housing estates with solar panels on the roofs, net contributors to the country's energy supply.

This idea sort of falls under environment, but I bet more people would look at it here, so here she goes. Busses travel in most cities for at least 15 hours of the day. During that time the bus may cover up to 300km. A filter placed on the roof of the bus would see a fair amount of air in one of those days. For example, if the dimensions of the filter were 2.5 x .5 meters then in the course of the day one bus could filter approximately 250,000 cubic meters of air. Filters could be...

Why not place coils that get hot around the spout or the entire faucet that heat up the water the instant you want HOT water? It seems like having a huge tank of water heated by gas or electric, would be more dangerous and expensive than having a relatively small coil to heat the water as needed. It would be like when you have dimming lights, except the energy would convert to heat not light.

I'd like to see legislation to require all new home/apartment/townhouse/commercial developments to have a certain percentage of south facing wall or roof area. It's for solar developement but the solar equipment is not required. The market place will one day soon demand that that area be used to collect energy and people will respond.

This is an idea for reducing air pollution in cities due to automobiles. A high voltage particle collector can be placed at every cross road points, which will collect suspended air particles & collect them at bottom in bags.

Just back from a conference where I saw a demonstration of a software simulator used in a negotiation among the institutional leaders of a city, a group of farmers and companies delivering water to the city. The negociation was about water beeing polluted by pesticides used by the farmers. I found the software very useful to elaborate scenarios consequent to the behavior of the different parties and to get the consensous of the parties on a certain scenario. Such a software could be...

We all know that if the amount of trash on planet earth keeps increasing at the current rate, we won't have any place for it! And there is that useless moon floating around earth way up there in space. So why not send our trash up there to be buried on the moon? A little strange I know, but it could be a possibility. And I'm not sure exactly how all this would happen, like if the garbage would stay underground or not. But it has potential, don't you think?? Please take the time to reply to...

A new CO2 scrubbing filter inspired by bird lungs could be applied to both power plants and automobiles. The scrubber will be based on the tiny tubes inside the lungs of birds, called parabronchii. The tubes, with their large surface area, are very efficient at filtering oxygen from the air--a necessary adaptation since birds fly often fly at altitudes where there is very little oxygen. Using the lungs as a model, it will be possible to design filters made of different-sized...

Many Europen nations have a surplus of electricity generating capacity. A cable laid across the Straits of Gibralter would enable electricity to be transmitted & sold to African nations which were connected up to a common electricity grid. The funding for such a cable (and the transmission grid) could come from a European sponsored 'Marshall Aid' type plan for Africa. This would further economic development in Africa and ease immigration pressures on Europe simultaneously. A classic...

We are worried about soil erosion filling our water dams with soil, leaving us with no more water in them and loss of rich soil from higher areas. So what if it is possible to build a dam or small dams near the place where soil erosion is taking place? It may stop the soil where it belongs and not fill our water dams. PS. If u happen to know any Dam Builders please inform them about this idea on this website.