Researchers say air pollution from the use of vital fertilizers means that fossil fuel emissions must be reduced if we are to feed the world’s growing population.
Greenhouse gases from cattle, fertilizers, manure and agriculture mean that human activities have turned the land and soil into part of the global warming machine.
The Boston Marathon bombing and its aftermath has dominated the nation's headlines. Yet, another series of explosions that happened two days later and took four times the number of lives, has gotten a fraction of the coverage.
A major slab of the world’s supply of phosphorous -- one of the two dwindling, non-synthesizable elements used in industrial agriculture -- sits in highly disputed territory in Morocco, making future access to it uncertain.