User:Eregli bob

is article on phosphate rock...... should be rated a stub....phosphate rock is a limited resource, quadrupled in price, will run out in 20 to 50 years, has radio activity, we are completely dependent upon it to feed world, is only available in rock form in very few countries, ...we need some deeper discussion of the issue....there are suggestions that phosphorus will bee the next limit to growth...see .Dana Cordell he Global Phosphorus Research Initiative