Question

Imagine a condition when all plants n animals food sources get depleted from the earth think n devise upon new ways of generating food from other sources and make a balanced diet of it

Answer 1

*commercial algae farms-
Algae are simple, single-cell organisms that can grow very rapidly at sea, in polluted water and in places that would normally kill food crops. Major airlines and shipping companies are now investigating a switch to algae oil, and smart clean tech money is pouring in to the nascent technology.

*Artificial meat-
It looks like meat, feels like meat and it is meat, although it's never been near a living, breathing animal. Instead, artificial or "cultured" meat is grown from stem cells in giant vats.

*Green super rice-
Agricultural Sciences and the International Rice Research Institute in the Philippines, he and his team developed "green super rice", a series of rice varieties which produce more grain but which have proved more resistant to droughts, floods, salty water, insects and disease .

*bugs -
rich in protein, low in fat and cholesterol and high in calcium and iron, but insect farms need little space. Environmentally, they beat conventional farms, too.

*cultured meat-
They grew strips of muscle tissue using stem cells taken from cows, which were said to resemble calamari in appearance