Not all problems are caused by personal choices.

A week after the asteroid impact, rotting vegetation, smoke and sulphur create a stinky planet. Plant and animal survivors succumb to the corrosive acid rain.

As cities grow, it would be better to have more efficient, higher-capacity transport than more vehicles on the road.

Overcrowded homes, mismatched dog groups and sizes are the biggest drivers of dog-on-dog aggression in South Africa.