India, May 26 -- The global population could halve as early as 2064 if global environmental crises intensify, a physicist at the University of Milan in Italy has hypothesised.

Alessio Zaccone's paper titled Global population crisis scenarios predicted by a general nonlinear dynamical mode, has been co-authored with his late colleague Kostya Trachenko from Queen Mary University of London.

The paper proposes a surprisingly simple nonlinear mathematical equation that unifies 12,000 years of human population growth and points to stark possible futures if global environmental crises intensify.

"Different growth regimes since the early Neolithic until the present can be interpreted within a single nonlinear rate-feedback equation in appropri...