sometimes
computers handheld divices
by using penises
your cousin's cousin's cousin i think
Fertilizers, Manure, Plows, Etc.
In order to have healthy crops the Egyptians used irrigation techniques to water their crops. Irrigation is the artificial application of water to crops.
Well There are many technologys
They are sustainable by having plenty of public transport and are encouraging people to use them.
Well back in 1969 there were many diffrent technologys hehe
chloroform, kitchen tables as operating rooms, leeches, pennicilin was first developed
At its present rate of use it is not.
Sustainable energy has been getting quite a bit of media time lately.
Radar, Jet Aircraft, Rocket Aircraft, Ballistic Missiles.