Cleantech could help cities save $17 trillion

Smart infrastructure choices from cities worldwide would save them $17 trillion (15.2 billion euros) by 2050. The solutions – renewable energy, public transportation, energy efficiency – are not new but the lens of this new study is interesting. 

Here come the toilets of the future

Here is a smelly question : why are we putting together what Nature separates ? This is the question asked by a Swedish researcher about toilets. Putting urine and feces together is not a good idea as it is simply a waste of resources. Moreover, flushing with liters and liters of perfectly drinkable water is… Continue reading Here come the toilets of the future

Putting the A/C at the right temperature

Air conditioning is a fantastic invention as it allows to remain cool when temperatures are reaching 30°C and even 40°C. However, in many buildings around the world, the A/C is not set at the right temperature. As the New York times noted : “Without fail, every year since moving to Hong Kong, I get a… Continue reading Putting the A/C at the right temperature

Singapore is the greenest city in Asia.

I admit I have a strange fascination for Singapore, a hub for Asia as well as a world leader in water treatment. The city -state achieved last year a whooping 15 percent economic growth, ie. ten times more than my home country. Almost despite this, it is according to Siemens’ Asian Green City Index, the… Continue reading Singapore is the greenest city in Asia.

Could aquaculture be a sustainable solution ?

As the New York Times notes aquaculture might be a good solution to avoid the depletion of fish stocks and thus be a sustainable way to feed the billion of people that will be born this century. However fish farming poses several problems such as diseases, water pollution, heavy antibiotics use and also may harm… Continue reading Could aquaculture be a sustainable solution ?

Can China build three fast rail transcontinental networks ?

While reading CleanTechnica I came across a tremendously huge project : link via high speed rail Asia and Europe. This network would enable to go from London to Beijing in only two days. Within ten years, the three networks would transport people and goods alike and would link 17 nations – including India, Singapore, Vietnam,… Continue reading Can China build three fast rail transcontinental networks ?

Water in Singapore : Conserve, Value, Enjoy

For this month’s article on CleanTechies we are moving from cleantech in France to focus on water management in Singapore as I read Erik Orsenna’s book on water. There are many interesting things to learn there. From massive rainwater harvesting to water treatment with 15 reservoirs and recycling and desalination, the island city covers 60… Continue reading Water in Singapore : Conserve, Value, Enjoy