TED Conversations  Usha Hegde  This conversation is closed.
Start a new conversation or join one »  Why are we not able to
find any economically feasible alternative energy source? How
long can we depend on fossil fuels?  Solar power has been in use
for quite long time now. But it is quite expensive. Why are we
not able to make solar power economically feasible? In Indian
villages, people use bio gas produced by cow dung for cooking
purposes. Why can't a similar bio gas be produced from kitchen
waste in urban areas? If the quantity is too small it can be
produced at least in restaurants and canteens?  progress
indicator   • Jan 22 2012: This looks interesting:
http://thepeoplescube.com/images/PerpetualMotion_Sidebar.jpg
Also if people can make many small energy-saving choices a
little differently, those choices can add-up to bigger effects.
Can you make a stove that is very tall, so several people can
cook at once, and the heat just keeps rising to the next higher
level to cook the other meals. Can t