Spending on environment yields big returns: report

The study estimated that annual investments of $60-$90 billion in the environment over 10-15 years were needed to reach a world goal of halving the proportion of humanity living on less than a dollar a day, currently more than a billion people.

A further $80 billion a year was needed to limit global warming, widely linked to gases from burning fossil fuels in factories, cars and power plants, over the next 50 years.