The number of people on the planet more than tripled since 1950 and could reach nearly 11 billion by the end of the century, says the Global Population Growth and Sustainable Development report.
Higher incomes contribute more to environmental degradation than population growth, a report by the UN Department of Economic and Social Affairs (DESA) has revealed.
The Global Population Growth and Sustainable Development report, launched on Wednesday, is the latest in a series on major demographic trends.
The number of people on the planet more than tripled since 1950 and could reach nearly 11 billion by the end of the century, according to the study, which examines the links between population growth and the social, economic and environmental dimensions of sustainable development.
Rich nations must act
“Whereas population growth magnifies the harmful impact of economic processes on the environment, the rise in per capita income has been more important than population growth in driving increased production and consumption and emissions of greenhouse gases,” the authors said.
“More affluent countries bear the greatest responsibility for moving rapidly to achieve net-zero emissions of greenhouse gases and for implementing strategies to decouple human economic activity from environmental degradation.”
Other key findings include that most of the world’s future population growth will take place in developing countries.
“Given the intrinsic momentum of population growth, the range of plausible trajectories for the size of global population is quite narrow over the next few decades,” DESA says. “For this reason, increased action by Governments to limit the growth of populations can do little to mitigate the forces of climate change between now and 2050.”
The report says that low-income and lower-middle-income countries need rapid and sustained growth of their economies to achieve the Sustainable Development Goals (SDGs). “Wealthy countries and the international community can help to ensure that these countries receive the necessary technical and financial assistance so that their economies can grow using technologies that will minimize future greenhouse gas emissions,” says DESA.
Success and failure
Populations are rising rapidly because people are living longer, thanks to improvements in public health, nutrition, personal hygiene and medicine.
The authors described this as “one of the greatest successes of social and economic development”.
However, rapid population growth also represents failure to ensure all people have the knowledge, ability and means to determine whether and when they want to have children.
Relatedly, providing access to reproductive health care, particularly for women, can accelerate social and economic development and help to disrupt intergenerational cycles of poverty.
‘Window of opportunity’
Meanwhile, countries with relatively high levels of fertility could invest in education and health, as well as promote full employment for all.
A resulting decline in fertility could create a “window of opportunity” for accelerated economic growth.
Other findings reveal how developing countries will require support to reduce future emissions as their economies advance, as well as the necessary technical and financial assistance.
Food systems will also have to become more sustainable to both meet growing needs and limit environmental damage.
Image: Wikimedia; By Ranjith66